javascript 应用小技巧方法汇总
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了javascript 应用小技巧方法汇总，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含35566字，纯文字阅读大概需要51分钟。
内容图文
javascript 在前端应用体验小技巧继续积累。
事件源对象 event.srcElement.tagName
event.srcElement.type
捕获释放 event.srcElement.setCapture();
event.srcElement.releaseCapture();
事件按键 event.keyCode event.shiftKey
event.altKey event.ctrlKey
事件返回值 event.returnValue
鼠标位置 event.x event.y
窗体活动元素 document.activeElement
绑定事件
document.captureEvents(Event.KEYDOWN);
访问窗体元素 document.all("txt").focus();
document.all("txt").select();
窗体命令 document.execCommand
窗体COOKIE document.cookie
菜单事件 document.oncontextmenu
创建元素 document.createElement("SPAN");
根据鼠标获得元素：
document.elementFromPoint(event.x,event.y).tagName=="TD
document.elementFromPoint(event.x,event.y).appendChild(ms)
窗体图片 document.images[索引]
窗体事件绑定
document.onmousedown=scrollwindow;
元素 document.窗体.elements[索引]
对象绑定事件
document.all.xxx.detachEvent('onclick',a);
插件数目 navigator.plugins
取变量类型 typeof($js_libpath) == "undefined"
下拉框 下拉框.options[索引]
下拉框.options.length
查找对象 document.getElementsByName("r1");
document.getElementById(id);
定时
timer=setInterval('scrollwindow()',delay);
clearInterval(timer);
UNCODE编码 escape() ,unescape
父对象 obj.parentElement(dhtml)
obj.parentNode(dom)
交换表的行 TableID.moveRow(2,1)
替换CSS document.all.csss.href = "a.css";
并排显示 display:inline
隐藏焦点 hidefocus=true
根据宽度换行
style="word-break:break-all"
自动刷新 <meta HTTP-EQUIV="refresh" CONTENT="8;URL=http://c98.yeah.net">
简单邮件 <a href="mailto:aaa@bbb.com?subject=ccc&body=xxxyyy">
快速转到位置
obj.scrollIntoView(true)
锚 <a name="first"> <a href="#first">anchors</a>
网页传递参数 location.search();
可编辑 obj.contenteditable=true
执行菜单命令 obj.execCommand
双字节字符 /[^\x00-\xff]/ 汉字
/[\u4e00-\u9fa5]/
让英文字符串超出表格宽度自动换行word-wrap: break-word; word-break: break-all;
透明背景 <IFRAME src="1.htm" width=300 height=180 allowtransparency></iframe>
获得style内容 obj.style.cssText
HTML标签
document.documentElement.innerHTML
第一个style标签 document.styleSheets[0]
style标签里的第一个样式
document.styleSheets[0].rules[0]
防止点击空链接时，页面往往重置到页首端。 <a href="javascript:function()">word</a>
上一网页源 asp: request.servervariables("HTTP_REFERER")
javascript: document.referrer
释放内存 CollectGarbage();
禁止右键document.oncontextmenu = function() { return false;}
禁止保存 <noscript><iframe src="*.htm"></iframe></noscript>
禁止选取<body oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false"onmouseup="document.selection.empty()>
禁止粘贴 <input type=text onpaste="return false">
地址栏图标 <link rel="Shortcut Icon" href="favicon.ico"> favicon.ico 名字最好不变16*16的16色,放虚拟目录根目录下
收藏栏图标 <link rel="Bookmark" href="favicon.ico">
查看源码 <input type=button value=查看网页源代码 onclick="window.location = 'view-source:'+ 'http://www.csdn.net/'">
关闭输入法 <input style="ime-mode:disabled">
自动全选<input type=text name=text1 value="123" onfocus="this.select()">
ENTER键可以让光标移到下一个输入框 <input onkeydown="if(event.keyCode==13)event.keyCode=9">
文本框的默认值 <input type=text value="123" onfocus="alert(this.defaultValue)">
title换行 obj.title = "123
sdfs "
获得时间所代表的微秒 var n1 = new Date("2004-10-10".replace(/-/g, "\/")).getTime()
窗口是否关闭 win.closed
checkbox扁平 <input type=checkbox style="position: absolute; clip:rect(5px 15px 15px 5px)"><br>
获取选中内容
document.selection.createRange().duplicate().text
自动完成功能 <input type=text autocomplete=on>打开该功能
<input type=text autocomplete=off>关闭该功能
窗口最大化 <body onload="window.resizeTo(window.screen.width - 4,window.screen.height-50);window.moveTo(-4,-4)">
无关闭按钮IE window.open("aa.htm", "meizz", "fullscreen=7");
统一编码/解码
alert(decodeURIComponent(encodeURIComponent("http://你好.com?as= hehe"))) encodeURIComponent对":"、"/"、";" 和 "?"也编码
表格行指示 <tr onmouseover="this.bgColor='#f0f0f0'" onmouseout="this.bgColor='#ffffff'">
//各种尺寸
s += "\r\n网页可见区域宽："+ document.body.clientWidth; s += "\r\n网页可见区域高："+ document.body.clientHeight; s += "\r\n网页可见区域高："+ document.body.offsetWeight +" (包括边线的宽)"; s += "\r\n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)"; s += "\r\n网页正文全文宽："+ document.body.scrollWidth; s += "\r\n网页正文全文高："+ document.body.scrollHeight; s += "\r\n网页被卷去的高："+ document.body.scrollTop; s += "\r\n网页被卷去的左："+ document.body.scrollLeft; s += "\r\n网页正文部分上："+ window.screenTop; s += "\r\n网页正文部分左："+ window.screenLeft; s += "\r\n屏幕分辨率的高："+ window.screen.height; s += "\r\n屏幕分辨率的宽："+ window.screen.width; s += "\r\n屏幕可用工作区高度："+ window.screen.availHeight; s += "\r\n屏幕可用工作区宽度："+ window.screen.availWidth;
//过滤数字
代码如下:<input type=text onkeypress="return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false">
//特殊用途
代码如下:<input type=button value=导入收藏夹 onclick="window.external.ImportExportFavorites(true,'http://localhost');"> <input type=button value=导出收藏夹 onclick="window.external.ImportExportFavorites(false,'http://localhost');"> <input type=button value=整理收藏夹 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)">
<input type=button value=语言设置 onclick="window.external.ShowBrowserUI('LanguageDialog', null)">
<input type=button value=加入收藏夹 onclick="window.external.AddFavorite('http://www.google.com/', 'google')"> <input type=button value=加入到频道 onclick="window.external.addChannel('http://www.google.com/')"> <input type=button value=加入到频道 onclick="window.external.showBrowserUI('PrivacySettings',null)">
//不缓存
代码如下:<META HTTP-EQUIV="pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="0">
//正则匹配
代码如下:匹配中文字符的正则表达式： [\u4e00-\u9fa5]
匹配双字节字符(包括汉字在内)：[^\x00-\xff] 匹配空行的正则表达式：\n[\s| ]*\r
匹配HTML标记的正则表达式：/<(.*)>.*<\/\1>|<(.*) \/>/
匹配首尾空格的正则表达式：(^\s*)|(\s*$)（像vbscript那样的trim函数）
匹配Email地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
匹配网址URL的正则表达式：http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)? 以下是例子： 利用正则表达式限制网页表单里的文本框输入内容： 用正则表达式限制只能输入中文：onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"
1.用正则表达式限制只能输入全角字符： onkeyup="value=value.replace(/[^\uFF00-\uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\uFF00-\uFFFF]/g,''))"
2.用正则表达式限制只能输入数字：onkeyup="value=value.replace(/[^\d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
3.用正则表达式限制只能输入数字和英文：onkeyup="value=value.replace(/[\W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"
//消除图像工具栏
代码如下:<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false"> or <head>
<meta http-equiv="imagetoolbar" content="no"> </head>
//无提示关闭
代码如下:function Close() { var ua=navigator.userAgent var ie=navigator.appName=="Microsoft Internet Explorer"?true:false if(ie) { var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE ")))) if(IEversion< 5.5) { var str = '<object id=noTipClose classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">'
str += '<param name="Command" value="Close"></object>';
document.body.insertAdjacentHTML("beforeEnd", str);
document.all.noTipClose.Click(); } else {
window.opener =null;
window.close(); } } else {
window.close() } }
//取得控件得绝对位置(1)
代码如下:<script language="javascript"> function getoffset(e) { var t=e.offsetTop; var l=e.offsetLeft; while(e=e.offsetParent) {
t+=e.offsetTop; l+=e.offsetLeft; } var rec = new Array(1);
rec[0] = t; rec[1] = l; return rec } </script>
//获得控件的绝对位置(2)
oRect = obj.getBoundingClientRect(); oRect.left oRect.
//最小化,最大化,关闭
<object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Minimize"></object> <object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Maximize"></object> <OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"> <PARAM NAME="Command" value="Close"></OBJECT> <input type=button value=最小化 onclick=min.Click()> <input type=button value=最大化 onclick=max.Click()> <input type=button value=关闭 onclick=close.Click()>
//光标停在文字最后
代码如下:<script language="javascript"> function cc() { var e = event.srcElement; var r =e.createTextRange();
r.moveStart('character',e.value.length); r.collapse(true); r.select(); } </script>
<input type=text name=text1 value="123" onfocus="cc()">
//页面进入和退出的特效
进入页面<meta http-equiv="Page-Enter" content="revealTrans(duration=x, transition=y)">
推出页面<meta http-equiv="Page-Exit" content="revealTrans(duration=x, transition=y)">
这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使 用哪种特效，取值为1-23:
0 矩形缩小 1 矩形扩大 2 圆形缩小 3 圆形扩大 4 下到上刷新
5 上到下刷新 6 左到右刷新 7 右到左刷新 8 竖百叶窗 9 横百叶窗
10 错位横百叶窗 11 错位竖百叶窗 12 点扩散 13 左右到中间刷新
14 中间到左右刷新 15 中间到上下 16 上下到中间 17 右下到左上 18 右上到左下
19 左上到右下 20 左下到右上 21 横条 22 竖条 23
//网页是否被检索
<meta name="ROBOTS" content="属性值"> 其中属性值有以下一些: 属性值为"all": 文件将被检索，且页上链接可被查询； 属性值为"none": 文件不被检索，而且不查询页上的链接； 属性值为"index": 文件将被检索； 属性值为"follow": 查询页上的链接； 属性值为"noindex": 文件不检索，但可被查询链接； 属性值为"nofollow":
//打印分页
<p style="page-break-after:always">page1</p>
<p style="page-break-after:always">page2</p>
//设置打印
<object id="factory" style="display:none" viewastext classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360" ></object>
<input type=button value=页面设置 onclick="factory.printing.PageSetup()">
<input type=button value=打印预览 onclick="factory.printing.Preview()">
<script language=javascript> function window.onload() { // -- advanced features factory.printing.SetMarginMeasure(2) // measure margins in inches factory.printing.SetPageRange(false, 1, 3) // need pages from 1 to 3 factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2 factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed" // -- basic features factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页"
factory.printing.footer = "（自定义页脚）"
factory.printing.portrait = false
factory.printing.leftMargin = 0.75
factory.printing.topMargin = 1.5
factory.printing.rightMargin = 0.75
factory.printing.bottomMargin = 1.5 } function Print(frame) {
factory.printing.Print(true, frame) // print with prompt } </script>
<input type=button value="打印本页" onclick="factory.printing.Print(false)">
<input type=button value="页面设置" onclick="factory.printing.PageSetup()">
<input type=button value="打印预览" onclick="factory.printing.Preview()"><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a>
//自带的打印预览
WebBrowser.ExecWB(1,1) 打开
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口 Web.ExecWB(4,1) 保存网页
Web.ExecWB(6,1) 打印 Web.ExecWB(7,1) 打印预览 Web.ExecWB(8,1) 打印页面设置
Web.ExecWB(10,1) 查看页面属性 Web.ExecWB(15,1) 好像是撤销，有待确认
Web.ExecWB(17,1) 全选 Web.ExecWB(22,1) 刷新 Web.ExecWB(45,1) 关闭窗体无提示
<style media=print>
.Noprint{display:none;}<!--用本样式在打印时隐藏非打印项目-->
.PageNext{page-break-after: always;}<!--控制分页--> </style>
<object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2">
</object> <center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>
//去掉打印时的页眉页脚
<script language="JavaScript"> var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root="HKEY_CURRENT_USER";
HKEY_Path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";
//设置网页打印的页眉页脚为空 function PageSetup_Null() { try {
var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); } catch(e){} } //设置网页打印的页眉页脚为默认值 function PageSetup_Default() { try
{ var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&w&b页码,&p/&P");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&u&b&d"); } catch(e){} } </script>
<input type="button" value="清空页码" onclick=PageSetup_Null()>
<input type="button" value="恢复页码" onclick=PageSetup_Default()>
//浏览器验证
function checkBrowser() { this.ver=navigator.appVersion this.dom=document.getElementById?1:0 this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0; this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; this.ie4=(document.all && !this.dom)?1:0; this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; this.ns4=(document.layers && !this.dom)?1:0; this.mac=(this.ver.indexOf('Mac') > -1) ?1:0;
this.ope=(navigator.userAgent.indexOf('Opera')>-1);
this.ie=(this.ie6 || this.ie5 || this.ie4) this.ns=(this.ns4 || this.ns5) this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns5 || this.ns4 || this.mac || this.ope) this.nbw=(!this.bw) return this;
}
//计算内容宽和高
<SCRIPT language="javascript"> function test(obj) { var range = obj.createTextRange();
alert("内容区宽度: " + range.boundingWidth
+ "px\r\n内容区高度: " + range.boundingHeight + "px"); }
</SCRIPT> <BODY> <Textarea id="txt" height="150">sdf</textarea><INPUT type="button" value="计算内容宽度" onClick="test(txt)"> </BODY>
//无模式的提示框
function modelessAlert(Msg) {
window.showModelessDialog("javascript:alert(\""+escape(Msg)+"\");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}
//屏蔽按键
<html>
<head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript>
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title>
</head> <body> <script language="Javascript"><!-- //屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 //Author: meizz(梅花雨) 2002-6-18 function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键 function window.onhelp(){return false} //屏蔽F1帮助 function document.onkeydown()
{ if ((window.event.altKey)&&
((window.event.keyCode==37)|| //屏蔽 Alt+ 方向键 ← (window.event.keyCode==39))) //屏蔽 Alt+ 方向键 → { alert("不准你使用ALT+方向键前进或后退网页！");
event.returnValue=false; }
/* 注：这还不是真正地屏蔽 Alt+ 方向键，
因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放， 用鼠标点掉警告框，这种屏蔽方法就失效了。以后若
有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/ if ((event.keyCode==8) || //屏蔽退格删除键 (event.keyCode==116)|| //屏蔽 F5 刷新键 (event.ctrlKey && event.keyCode==82)){ //Ctrl + R event.keyCode=0;
event.returnValue=false; }
if (event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11 if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //屏蔽 Ctrl+n if (event.shiftKey && event.keyCode==121)event.returnValue=false; //屏蔽 shift+F10 if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页 if ((window.event.altKey)&&(window.event.keyCode==115)) //屏蔽Alt+F4 {
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false; } } </script>
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键 </body>
</html>
//屏蔽打印 <style> @media print{ * {display:none} } </style>
//移动的图层，拖动
1.<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span>
<script language=javascript> var Obj; function MouseDown(obj) { Obj=obj;
Obj.setCapture(); Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop; } function MouseMove() { if(Obj!=null)
{ Obj.style.left = event.x-Obj.l;
Obj.style.top = event.y-Obj.t; } } function MouseUp() { if(Obj!=null)
{ Obj.releaseCapture(); Obj=null; } } </script> 2.
<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();"> <a href="#" onclick="return false"><h1>wlecome</h1></a>
</div> <script language="JavaScript" type="text/javascript"> var orgMouseX; var orgMouseY; var orgObjX; var orgObjY; function doDrag() { var myObject=document.all.myDiv;
var x=event.clientX; var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY); } function doMouseDown() {
orgMouseX=event.clientX; orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top); }
</script>
//文档状态改变
<iframe src="a.html" id="f" name="f" scrolling="no" frameborder=0 marginwidth=0 marginheight=0></iframe>
<script> var doc=window.frames["f"].document; function s(){ if (doc.readyState=="complete"){
document.all.f.style.height=doc.body.scrollHeight
document.all.f.style.width=doc.body.scrollWidth } }
doc.onreadystatechange=s </script>
//刷新后不变的文本框
<HTML>
<HEAD> <META NAME="save" CONTENT="history"> <STYLE>
.sHistory {behavior:url(#default#savehistory);} </STYLE>
</HEAD> <BODY>
<INPUT class="sHistory" type=text id=oPersistInput> </BODY>
</HTML>
//访问剪贴板
(1)拖拽访问
event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL") (2)普通访问
window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");
//操作COOKIE
function SetCookie(sName, sValue) {
document.cookie = sName + "=" + escape(sValue) + "; "; } function GetCookie(sName) { var aCookie = document.cookie.split("; "); for (var i=0; i < aCookie.length; i++) {
var aCrumb = aCookie[i].split("="); if (sName == aCrumb[0]) return unescape(aCrumb[1]); } }
function DelCookie(sName) {
document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;"; }
//setTimeout增加参数
代码如下:<script>
var _st = window.setTimeout;
window.setTimeout = function(fRef, mDelay) { if(typeof fRef == 'function'){ var argu = Array.prototype.slice.call(arguments,2);
var f = (function(){ fRef.apply(null, argu); }); return _st(f, mDelay); } return _st(fRef,mDelay); } function test(x){ alert(x); }
window.setTimeout(test,1000,'fason'); </script>
//自定义的apply,call
代码如下:Function.prototype.apply = function (obj, argu) { if (obj) obj.constructor.prototype._caller = this; var argus = new Array();
for (var i=0;i<argu.length;i++)
argus[i] = "argu[" + i + "]"; var r; eval("r = " + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");"))); return r; };
Function.prototype.call = function (obj) { var argu = new Array();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments[i]; return this.apply(obj, argu); };
//下载文件
代码如下:function DownURL(strRemoteURL,strLocalURL) {
try { var xmlHTTP=new ActiveXObject("Microsoft.XMLHTTP"); xmlHTTP.open("Get",strRemoteURL,false); xmlHTTP.send(); var adodbStream=new ActiveXObject("ADODB.Stream"); adodbStream.Type=1;//1=adTypeBinary adodbStream.Open();
adodbStream.write(xmlHTTP.responseBody);
adodbStream.SaveToFile(strLocalURL,2); adodbStream.Close();
adodbStream=null; xmlHTTP=null; } catch(e) { window.confirm("下载URL出错!"); } //window.confirm("下载完成."); }
//检验连接是否有效
代码如下:function getXML(URL) { var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL, false); try { xmlhttp.Send();
} catch(e){} finally { var result = xmlhttp.responseText; if(result) { if(xmlhttp.Status==200) { return(true);
} else { return(false);
} } else {
return(false); } } }
//POST代替FORM
代码如下:<SCRIPT language="VBScript"> Function URLEncoding(vstrIn)
strReturn = ""
For i = 1 To Len(vstrIn) ThisChr = Mid(vStrIn,i,1)
If Abs(Asc(ThisChr)) < &HFF Then
strReturn = strReturn & ThisChr Else
innerCode = Asc(ThisChr)
If innerCode < 0 Then
innerCode = innerCode + &H10000 End If
Hight8 = (innerCode And &HFF00)\ &HFF
Low8 = innerCode And &HFF
strReturn = strReturn & "%" & Hex(Hight8) & "%" & Hex(Low8) End If
Next URLEncoding = strReturn End Function
Function bytes2BSTR(vIn) strReturn = "" For i = 1 To LenB(vIn)
ThisCharCode = AscB(MidB(vIn,i,1))
If ThisCharCode < &H80 Then
strReturn = strReturn & Chr(ThisCharCode) Else
NextCharCode = AscB(MidB(vIn,i+1,1))
strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))
i = i + 1 End If Next
bytes2BSTR = strReturn End Function dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP") oReq.open "POST","http://ServerName/VDir/TstResult.asp",false oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA msgbox bytes2BSTR(oReq.responseBody) </SCRIPT>
//readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成
//组件是否安装
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))
//检查网页是否存在
代码如下:function CheckURL(URL) { var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); xmlhttp.Open("GET",URL, false); try {
xmlhttp.Send(); var result = xmlhttp.status; } catch(e) {return(false); } if(result==200) { return true;
} xmlhttp = null; return false;
}
//连接数据库
代码如下:<script language="javascript"> //用 JavaScript 写服务器端连接数据库的代码示例 var conn = new ActiveXObject("ADODB.Connection"); conn.Open("Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; "
+"Password=; Initial Catalog=pubs");
var rs = new ActiveXObject("ADODB.Recordset"); var sql="select * from authors"; rs.open(sql, conn);
shtml = "<table width='100%' border=1>";
shtml +="<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>";
while(!rs.EOF) {
shtml += "<tr><td>" + rs("au_id") + "</td><td>" + rs("au_lname") + "</td><td>" + rs("au_fname") + "</td><td>" + rs("phone") + "</td><td>" + rs("address") + "</td><td>" + rs("city") + "</td><td>" + rs("state") + "</td><td>" + rs("zip") + "</td></tr>"; rs.moveNext;
} shtml += "</table>";
document.write(shtml); rs.close(); rs = null; conn.close(); conn = null; </script>
//使用数据岛
代码如下:<html>
<body>
srno：<input type=text datasrc=#xmldate DataFLD=srno size="76"><BR>
times：<input type=text datasrc=#xmldate DataFLD=times size="76"><BR> <input id="first" TYPE=button value="<< 第一条记录" onclick="xmldate.recordset.moveFirst()">
<input id="prev" TYPE=button value="<上一条记录" onclick="xmldate.recordset.movePrevious()">
<input id="next" TYPE=button value="下一条记录>" onclick="xmldate.recordset.moveNext()">
<input id="last" TYPE=button value="最后一条记录>>" onclick="xmldate.recordset.moveLast()">
<input id="Add" TYPE=button value="添加新记录" onclick="xmldate.recordset.addNew()">
<XML ID="xmldate">
<infolist>
<info ><srno>20041025-01</srno><times>null</times></info>
<info ><srno>20041101-09</srno><times>2004年10月1日2点22分0秒</times></info>
</infolist> </XML> </body> </html>
//获得参数
代码如下:<body>
<a href="javascript:location.href=location.href + '?a=1&b=2'">search</a>
<script language="JavaScript">
<!-- var a = location.search.substr(1); if(a.length>0) { var re = /([^&]*?)\=([^&]*)/g var s = a.match(re); for(var i= 0;i<s.length;i++) {
alert(s[i]); alert(s[i].split("=")[1]); } } //--> </script> </body>
//可编辑SELECT
代码如下:<input type=text name=re_name style="width:100px;height:21px;font-size:10pt;"><span style="width:18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;width:118px; background-color:#FFEEEE;" onChange="document.all.re_name.value=this.value;">
<option value="1">11111111<option>
<option value="2">222222</option>
<option value="3">333333</option>
</select> </span>
//设置光标位置
代码如下:function getCaret(textbox) { var control = document.activeElement;
textbox.focus(); var rang = document.selection.createRange();
rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus(); return rang.text.length; } function setCaret(textbox,pos) { try
{ var r =textbox.createTextRange();
r.moveStart('character',pos); r.collapse(true); r.select(); } catch(e) {} } function selectLength(textbox,start,len) {
try { var r =textbox.createTextRange();
r.moveEnd('character',len-(textbox.value.length-start));
r.moveStart('character',start); r.select(); } catch(e) {//alert(e.description)} } function insertAtCaret(textbox,text) {
textbox.focus(); document.selection.createRange().text = text; }
//页内查找
代码如下:function findInPage(str) { var txt, i, found,n = 0; if (str == "")
{ return false; }
txt = document.body.createTextRange();
for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) { txt.moveStart("character", 1); txt.moveEnd("textedit"); } if (found) { txt.moveStart("character", -1); txt.findText(str);
txt.select(); txt.scrollIntoView(); n++; } else
{ if (n > 0) {
n = 0; findInPage(str); } else {
alert(str + "... 您要找的文字不存在。\n \n请试着输入页面中的关键字再次查找！");
} } return false; }
//操作EXECL
代码如下:<script language="javascript"> function jStartExcel() { var xls = new ActiveXObject ( "Excel.Application" ); xls.visible = true; var newBook = xls.Workbooks.Add;
newBook.Worksheets.Add; newBook.Worksheets(1).Activate;
xls.ActiveWorkBook.ActiveSheet.PageSetup.Orientation = 2;
xls.ActiveWorkBook.ActiveSheet.PageSetup.PaperSize = 5;
newBook.Worksheets(1).Columns("A").columnwidth=50;
newBook.Worksheets(1).Columns("A").WrapText = true; newBook.Worksheets(1).Columns("B").columnwidth=50;
newBook.Worksheets(1).Columns("B").WrapText = true; newBook.Worksheets(1).Range("A1:B1000").NumberFormat = "0"; newBook.Worksheets(1).Range("A1:B1000").HorizontalAlignment = -4131;
newBook.Worksheets(1).Cells(1,1).Interior.ColorIndex="15";
newBook.Worksheets(1).Cells(1,1).value="First Column, First Cell";
newBook.Worksheets(1).Cells(2,1).value="First Column, Second Cell";
newBook.Worksheets(1).Cells(1,2).value="Second Column, First Cell";
newBook.Worksheets(1).Cells(2,2).value="Second Column, Second Cell";
newBook.Worksheets(1).Name="My First WorkSheet"; } </script>
//自定义提示条
<a href="#" title="这是提示">tip</a>
<script Language="JavaScript">
//***********默认设置定义.********************* tPopWait=50;//停留tWait豪秒后显示提示。 tPopShow=5000;//显示tShow豪秒后关闭提示 showPopStep=20; popOpacity=99; //***************内部变量定义***************** sPop=null; curShow=null; tFadeOut=null; tFadeIn=null; tFadeWaiting=null; document.write("<style type='text/css'id='defaultPopStyle'>");
document.write(".cPopText { background-color: #F8F8F5;color:#000000; border: 1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left: 4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id='dypopLayer' style='position:absolute;z-index:1000;' class='cPopText'></div>");
function showPopupText(){ var o=event.srcElement; MouseX=event.x;
MouseY=event.y; if(o.alt!=null && o.alt!=""){o.dypop=o.alt;o.alt=""}; if(o.title!=null && o.title!=""){o.dypop=o.title;o.title=""}; if(o.dypop!=sPop) { sPop=o.dypop;
clearTimeout(curShow); clearTimeout(tFadeOut);
clearTimeout(tFadeIn); clearTimeout(tFadeWaiting); if(sPop==null || sPop=="") { dypopLayer.innerHTML=""; dypopLayer.style.filter="Alpha()"; dypopLayer.filters.Alpha.opacity=0;
} else { if(o.dyclass!=null) popStyle=o.dyclass else popStyle="cPopText"; curShow=setTimeout("showIt()",tPopWait); } } } function showIt(){
dypopLayer.className=popStyle; dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth; popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
else popLeftAdjust=0; if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
else popTopAdjust=0;
dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
dypopLayer.style.filter="Alpha(Opacity=0)"; fadeOut(); } function fadeOut(){ if(dypopLayer.filters.Alpha.opacity<popOpacity) {
dypopLayer.filters.Alpha.opacity+=showPopStep; tFadeOut=setTimeout("fadeOut()",1); } else {
dypopLayer.filters.Alpha.opacity=popOpacity;
tFadeWaiting=setTimeout("fadeIn()",tPopShow); } } function fadeIn(){ if(dypopLayer.filters.Alpha.opacity>0) {
dypopLayer.filters.Alpha.opacity-=1; tFadeIn=setTimeout("fadeIn()",1); } }
document.onmouseover=showPopupText; </script>
//插入文字
代码如下:document.onclick =function(){ var oSource = window.event.srcElement; if(oSource.tagName!="DIV") return false;
var sel = document.selection; if (sel!=null) { var rng = sel.createRange(); if (rng!=null) rng.pasteHTML("<font color=red>插入文字</font>");
} }
//netscapte下操作xml
doc = new ActiveXObject("Msxml2.DOMDocument"); doc = new ActiveXObject("Microsoft.XMLDOM") ->> doc = (new DOMParser()).parseFromString(sXML,'text/xml')
//判断键值
代码如下:<html>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <head>
<script language="javascript">
var ie =navigator.appName=="Microsoft Internet Explorer"?true:false;
function keyDown(e) {
if(!ie) { var nkey=e.which; var iekey='现在是ns浏览器'; var realkey=String.fromCharCode(e.which); } if(ie) { var iekey=event.keyCode; var nkey='现在是ie浏览器'; var realkey=String.fromCharCode(event.keyCode); if(event.keyCode==32){realkey='\' 空格\''}
if(event.keyCode==13){realkey='\' 回车\''}
if(event.keyCode==27){realkey='\' Esc\''}
if(event.keyCode==16){realkey='\' Shift\''}
if(event.keyCode==17){realkey='\' Ctrl\''}
if(event.keyCode==18){realkey='\' Alt\''} }
alert('ns浏览器中键值:'+nkey+'\n'+'ie浏览器中键值:'+iekey+'\n'+'实际键为'+realkey); }
document.onkeydown = keyDown; </script> </head>
<body> //Javascript Document. <hr> <center> <h3>请按任意一个键。。。。</h3>
</center> </body> </html>
//禁止FSO
1.注销组件
regsvr32 /u scrrun.dll 2.修改PROGID
HKEY_CLASSES_ROOT\Scripting.FileSystemObject Scripting.FileSystemObject
3.对于使用object的用户，修改HKEY_CLASSES_ROOT\Scripting.
//省略号
<DIV STYLE="width: 120px; height: 50px; border: 1px solid blue;
overflow: hidden; text-overflow:ellipsis">
<NOBR>就是比如有一行文字，很长，表格内一行显示不下.</NOBR> </DIV>
//检测media play版本
<IE:clientCaps ID="oClientCaps" style="{behavior:url(#default#clientcaps)}" />
<SCRIPT> var flash="";
WMPVersion= oClientCaps.getComponentVersion("{22D6F312-B0F6-11D0-94AB-0080C74C7E95}","ComponentID"); if (WMPVersion != "") { flash = ""; var version = WMPVersion.split(","); var i;
for (i = 0; i < version.length; i++) { if (i != 0) flash += "."; flash += version[i]; }
document.write("您的Windows Media Player 版本是:"+flash+"<p>"); } </SCRIPT>
//图象按比例
<script language="JavaScript"> <!-- //图片按比例缩放 var flag=false; function DrawImage(ImgD){ var image=new Image(); var iwidth = 80; //定义允许图片宽度 var iheight = 80; //定义允许图片高度 image.src=ImgD.src; if(image.width>0 && image.height>0){
flag=true; if(image.width/image.height>= iwidth/iheight){
if(image.width>iwidth){
ImgD.width=iwidth; ImgD.height=(image.height*iwidth)/image.width;
}else{ ImgD.width=image.width;
ImgD.height=image.height; } ImgD.alt=image.width+"×"+image.height; } else{ if(image.height>iheight){
ImgD.height=iheight;
ImgD.width=(image.width*iheight)/image.height; }else{ ImgD.width=image.width;
ImgD.height=image.height; } ImgD.alt=image.width+"×"+image.height; } } } //--> </script> <img src=".." onload = "DrawImage(this)">
//细线SELECT
<span style="border:1px solid #000000; position:absolute; overflow:hidden;" > <select style="margin:-2px;"> <option>1111</option> <option>11111111111111</option> <option>111111111</option> </select></span>
//Import
function Import() { for( var i=0; i<arguments.length; i++ ) {
var file = arguments[i]; if ( file.match(/\.js$/i))
document.write('<script type=\"text/javascript\" src=\"' + file + '\"></sc' + 'ript>');
else
document.write('<style type=\"text/css\">@import \"' + file + '\" ;</style>');
} };
//js枚举
function getComputerName() { var objWMIService = GetObject("Winmgmts:root\cimv2"); for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext())
{ var getComputer = e.item();
return getComputer.Name; }
}
//条件编译
<script language=javascript>
/*@cc_on @*/ /*@if (@_win32 && @_jscript_version>5)
function window.confirm(str) {
execScript("n = msgbox('"+ str +"', 257)", "vbscript");
return(n == 1); } @end @*/ </script>
//取得innerText
<SCRIPT LANGUAGE="JavaScript"> <!-- var xmlDoc = new ActiveXObject("Msxml2.DOMDocument.4.0"); var currNode; xmlDoc.async = false; xmlDoc.async = false; xmlDoc.loadXML("<TABLENAME> 你好你阿三 大法 司法等四 </TABLENAME>");
currNode = xmlDoc.documentElement; var s = currNode.xml; var r = /\<([^\>\s]*?)[^\>]*?\>([^\<]*?)\<\/\1\>/
var b = s.replace(r,"$2"); alert(b); //--> </SCRIPT>
//mergeAttributes 复制所有读/写标签属性到指定元素。
<SCRIPT>
function fnMerge(){
oSource.children[1].mergeAttributes(oSource.children[0]); }
</SCRIPT> <SPAN ID=oSource> <DIV ID="oDiv" ATTRIBUTE1="true" ATTRIBUTE2="true" onclick="alert('click');" onmouseover="this.style.color='#0000FF';" onmouseout="this.style.color='#000000';" >
This is a sample <B>DIV</B> element. </DIV>
<DIV ID="oDiv2">
This is another sample <B>DIV</B> element. </DIV>
</SPAN> <INPUT TYPE="button" VALUE="Merge Attributes" onclick="fnMerge()" >
以上所述就是本文的全部内容了，希望大家能够喜欢。
内容总结
以上是互联网集市为您收集整理的javascript 应用小技巧方法汇总全部内容，希望文章能够帮你解决javascript 应用小技巧方法汇总所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。