javascript常用方法函数收集

收集了一些比较常用的javascript函数。
1、字符串长度截取
function cutstr(str, len) {
    var temp,
        icount = 0,
        patrn = /[^\x00-\xff]/，
        strre = "";
    for (var i = 0; i < str.length; i++) {
        if (icount < len - 1) {
            temp = str.substr(i, 1);
                if (patrn.exec(temp) == null) {
                   icount = icount + 1
            } else {
                icount = icount + 2
            }
            strre += temp
            } else {
            break;
        }
    }
    return strre + "..."
}
2、替换全部
String.prototype.replaceAll = function(s1, s2) {
    return this.replace(new RegExp(s1, "gm"), s2)
}
3、清除空格
String.prototype.trim = function() {
    var reExtraSpace = /^\s*(.*?)\s+$/;
    return this.replace(reExtraSpace, "$1")
}
4、清除左空格/右空格
function ltrim(s){ return s.replace( /^(\s*|　*)/, ""); } 
function rtrim(s){ return s.replace( /(\s*|　*)$/, ""); }
5、判断是否以某个字符串开头
String.prototype.startWith = function (s) {
    return this.indexOf(s) == 0
}
6、判断是否以某个字符串结束
String.prototype.endWith = function (s) {
    var d = this.length - s.length;
    return (d >= 0 && this.lastIndexOf(s) == d)
}
7、转义html标签
function HtmlEncode(text) {
    return text.replace(/&/g, ‘&‘).replace(/\"/g, ‘"‘).replace(/</g, ‘<‘).replace(/>/g, ‘>‘)
}
8、时间日期格式转换
Date.prototype.Format = function(formatStr) {
    var str = formatStr;
    var Week = [‘日‘, ‘一‘, ‘二‘, ‘三‘, ‘四‘, ‘五‘, ‘六‘];
    str = str.replace(/yyyy|YYYY/, this.getFullYear());
    str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : ‘0‘ + (this.getYear() % 100));
    str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : ‘0‘ + (this.getMonth() + 1));
    str = str.replace(/M/g, (this.getMonth() + 1));
    str = str.replace(/w|W/g, Week[this.getDay()]);
    str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : ‘0‘ + this.getDate());
    str = str.replace(/d|D/g, this.getDate());
    str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : ‘0‘ + this.getHours());
    str = str.replace(/h|H/g, this.getHours());
    str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : ‘0‘ + this.getMinutes());
    str = str.replace(/m/g, this.getMinutes());
    str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : ‘0‘ + this.getSeconds());
    str = str.replace(/s|S/g, this.getSeconds());
    return str
}
9、判断是否为数字类型
function isDigit(value) {
    var patrn = /^[0-9]*$/;
    if (patrn.exec(value) == null || value == "") {
        return false
    } else {
        return true
    }
}
10、设置cookie值
function setCookie(name, value, Hours) {
    var d = new Date();
    var offset = 8;
    var utc = d.getTime() + (d.getTimezoneOffset() * 60000);
    var nd = utc + (3600000 * offset);
    var exp = new Date(nd);
    exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"
}
 

11、获取cookie值
function getCookie(name) {
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null) return unescape(arr[2]);
    return null
}
12、加入收藏夹
function AddFavorite(sURL, sTitle) {
    try {
        window.external.addFavorite(sURL, sTitle)
    } catch(e) {
        try {
            window.sidebar.addPanel(sTitle, sURL, "")
        } catch(e) {
            alert("加入收藏失败，请使用Ctrl+D进行添加")
        }
    }
}
13、设为首页
function setHomepage() {
    if (document.all) {
        document.body.style.behavior = ‘url(#default#homepage)‘;
        document.body.setHomePage(‘http://w3cboy.com‘)
    } else if (window.sidebar) {
        if (window.netscape) {
            try {
                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
            } catch(e) {
                alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true")
                }
        }
        var prefs = Components.classes[‘@mozilla.org/preferences-service;1‘].getService(Components.interfaces.nsIPrefBranch);
        prefs.setCharPref(‘browser.startup.homepage‘, ‘http://w3cboy.com‘)
    }
}
14、加载样式文件
function LoadStyle(url) {
    try {
        document.createStyleSheet(url)
    } catch(e) {
        var cssLink = document.createElement(‘link‘);
        cssLink.rel = ‘stylesheet‘;
        cssLink.type = ‘text/css‘;
        cssLink.href = url;
        var head = document.getElementsByTagName(‘head‘)[0];
        head.appendChild(cssLink)
    }
}
15、返回脚本内容
function evalscript(s) {
    if(s.indexOf(‘<script‘) == -1) return s;
    var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;
    var arr = [];
    while(arr = p.exec(s)) {
        var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;
        var arr1 = [];
        arr1 = p1.exec(arr[0]);
        if(arr1) {
            appendscript(arr1[1], ‘‘, arr1[2], arr1[3]);
        } else {
            p1 = /<script(.*?)>([^\x00]+?)<\/script>/i;
            arr1 = p1.exec(arr[0]);
            appendscript(‘‘, arr1[2], arr1[1].indexOf(‘reload=‘) != -1);
        }
    }
    return s;
}
16、清除脚本内容
function stripscript(s) {
    return s.replace(/<script.*?>.*?<\/script>/ig, ‘‘);
}
17、动态加载脚本文件
function appendscript(src, text, reload, charset) {
    var id = hash(src + text);
    if(!reload && in_array(id, evalscripts)) return;
    if(reload && $(id)) {
        $(id).parentNode.removeChild($(id));
    }
 
    evalscripts.push(id);
    var scriptNode = document.createElement("script");
    scriptNode.type = "text/javascript";
    scriptNode.id = id;
    scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset);
    try {
        if(src) {
            scriptNode.src = src;
            scriptNode.onloadDone = false;
            scriptNode.onload = function () {
                scriptNode.onloadDone = true;
                JSLOADED[src] = 1;
             };
             scriptNode.onreadystatechange = function () {
                 if((scriptNode.readyState == ‘loaded‘ || scriptNode.readyState == ‘complete‘) && !scriptNode.onloadDone) {
                    scriptNode.onloadDone = true;
                    JSLOADED[src] = 1;
                }
             };
        } else if(text){
            scriptNode.text = text;
        }
        document.getElementsByTagName(‘head‘)[0].appendChild(scriptNode);
    } catch(e) {}
}
18、返回按ID检索的元素对象
function $(id) {
    return !id ? null : document.getElementById(id);
}
19、跨浏览器绑定事件
function addEventSamp(obj,evt,fn){ 
    if(!oTarget){return;}
    if (obj.addEventListener) { 
        obj.addEventListener(evt, fn, false); 
    }else if(obj.attachEvent){ 
        obj.attachEvent(‘on‘+evt,fn); 
    }else{
        oTarget["on" + sEvtType] = fn;
    } 
}
20、跨浏览器删除事件
function delEvt(obj,evt,fn){
    if(!obj){return;}
    if(obj.addEventListener){
        obj.addEventListener(evt,fn,false);
    }else if(oTarget.attachEvent){
        obj.attachEvent("on" + evt,fn);
    }else{
        obj["on" + evt] = fn;
    }
}
21、为元素添加on方法
Element.prototype.on = Element.prototype.addEventListener;
 
NodeList.prototype.on = function (event, fn) {、
    [][‘forEach‘].call(this, function (el) {
        el.on(event, fn);
    });
    return this;
};
22、为元素添加trigger方法
Element.prototype.trigger = function (type, data) {
    var event = document.createEvent(‘HTMLEvents‘);
    event.initEvent(type, true, true);
    event.data = data || {};
    event.eventName = type;
    event.target = this;
    this.dispatchEvent(event);
    return this;
};
 
NodeList.prototype.trigger = function (event) {
    [][‘forEach‘].call(this, function (el) {
        el[‘trigger‘](event);
    });
    return this;
};
23、检验URL链接是否有效
function getUrlState(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); 
         } 
    }
}
24、格式化CSS样式代码
function formatCss(s){//格式化代码
    s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    s = s.replace(/\,[\s\.\#\d]*{/g, "{");
    s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2");
    s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2");
    s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2");
    return s;
}
25、压缩CSS样式代码
function compressCss (s) {//压缩代码
    s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释
    s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1");
    s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理
    s = s.replace(/;\s*;/g, ";"); //清除连续分号
    s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白
    return (s == null) ? "" : s[1];
}
26、获取当前路径
var currentPageUrl = "";
if (typeof this.href === "undefined") {
    currentPageUrl = document.location.toString().toLowerCase();
}else {
    currentPageUrl = this.href.toString().toLowerCase();
}
27、判断是否移动设备
function isMobile(){
    if (typeof this._isMobile === ‘boolean‘){
        return this._isMobile;
    }
    var screenWidth = this.getScreenWidth();
    var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport ||rendererModel.runningExperiments.fixviewport;
    var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
    if(!fixViewPortsExperiment){
        if(!this.isAppleMobileDevice()){
            screenWidth = screenWidth/window.devicePixelRatio;
        }
    }
    var isMobileScreenSize = screenWidth < 600;
    var isMobileUserAgent = false;
    this._isMobile = isMobileScreenSize && this.isTouchScreen();
    return this._isMobile;
}
28、判断是否移动设备访问
function isMobileUserAgent(){
    return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));
}
29、判断是否苹果移动设备访问
function isAppleMobileDevice(){
    return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));
}
30、判断是否安卓移动设备访问
function isAndroidMobileDevice(){
    return (/android/i.test(navigator.userAgent.toLowerCase()));
}
31、判断是否Touch屏幕
function isTouchScreen(){
    return ((‘ontouchstart‘ in window) || window.DocumentTouch && document instanceof DocumentTouch);
}
32、判断是否打开视窗
function isViewportOpen() {
    return !!document.getElementById(‘wixMobileViewport‘);
}
33、获取移动设备初始化大小
function getInitZoom(){
    if(!this._initZoom){
        var screenWidth = Math.min(screen.height, screen.width);
        if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
            screenWidth = screenWidth/window.devicePixelRatio;
        }
            this._initZoom = screenWidth /document.body.offsetWidth;
        }
    return this._initZoom;
}
34、获取移动设备最大化大小
function getZoom(){
    var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);
    if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
        screenWidth = screenWidth/window.devicePixelRatio;
    }
    var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
    var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");
    if(FixViewPortsExperimentRunning){
        return screenWidth / window.innerWidth;
    }else{
        return screenWidth / document.body.offsetWidth;
    }
}
35、获取移动设备屏幕宽度
function getScreenWidth(){
    var smallerSide = Math.min(screen.width, screen.height);
    var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;
    var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");
    if(fixViewPortsExperiment){
        if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){
            smallerSide = smallerSide/window.devicePixelRatio;
        }
    }
    return smallerSide;
}
36、完美判断是否为网址
function IsURL(strUrl) {
    var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i
    if (regular.test(strUrl)) {
        return true;
    }else {
        return false;
    }
}
37、去掉url前缀
function removeUrlPrefix(a){
    a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/");
    while(trim(a).toLowerCase().indexOf("http://")==0){
        a=trim(a.replace(/http:\/\//i,""));
    }
    return a;
}
38、随机数时间戳
function uniqueId(){
    var a=Math.random,b=parseInt;
    return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());
}
39、时间个性化输出功能
 1 /*
 2 1、< 60s, 显示为“刚刚”
 3 2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”
 4 3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”
 5 4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”
 6 5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”
 7 */
 8 function timeFormat(time){
 9     var date = new Date(time),
10         curDate = new Date(),
11         year = date.getFullYear(),
12         month = date.getMonth() + 10,
13         day = date.getDate(),
14         hour = date.getHours(),
15         minute = date.getMinutes(),
16         curYear = curDate.getFullYear(),
17         curHour = curDate.getHours(),
18         timeStr;
19  
20     if(year < curYear){
21         timeStr = year +‘年‘+ month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute;
22     }else{
23         var pastTime = curDate - date,
24             pastH = pastTime/3600000;
25  
26         if(pastH > curHour){
27               timeStr = month +‘月‘+ day +‘日 ‘+ hour +‘:‘+ minute;
28         }else if(pastH >= 1){
29               timeStr = ‘今天 ‘ + hour +‘:‘+ minute +‘分‘;
30         }else{
31               var pastM = curDate.getMinutes() - minute;
32               if(pastM > 1){
33                 timeStr = pastM +‘分钟前‘;
34               }else{
35                 timeStr = ‘刚刚‘;
36               }
37         }
38     }
39     return timeStr;
40 }
40、常用的正则表达式
 1 //正整数
 2 /^[0-9]*[1-9][0-9]*$/;
 3 //负整数
 4 /^-[0-9]*[1-9][0-9]*$/;
 5 //正浮点数
 6 /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;   
 7 //负浮点数
 8 /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/;  
 9 //浮点数
10 /^(-?\d+)(\.\d+)?$/;
11 //email地址
12 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
13 //url地址
14 /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;
15 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\‘:+!]*([^<>\"\"])*$ 
16 //年/月/日（年-月-日、年.月.日）
17 /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;
18 //匹配中文字符
19 /[\u4e00-\u9fa5]/;
20 //匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)
21 /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;
22 //匹配空白行的正则表达式
23 /\n\s*\r/;
24 //匹配中国邮政编码
25 /[1-9]\d{5}(?!\d)/;
26 //匹配身份证
27 /\d{15}|\d{18}/;
28 //匹配国内电话号码
29 /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;
30 //匹配IP地址
31 /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;
32 //匹配首尾空白字符的正则表达式
33 /^\s*|\s*$/;
34 //匹配HTML标记的正则表达式
35 < (\S*?)[^>]*>.*?|< .*? />;
36 //sql 语句
37 ^(select|drop|delete|create|update|insert).*$
38 //提取信息中的网络链接
39 (h|H)(r|R)(e|E)(f|F) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)? 
40 //提取信息中的邮件地址
41 \w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 
42 //提取信息中的图片链接
43 (s|S)(r|R)(c|C) *= *(‘|")?(\w|\\|\/|\.)+(‘|"| *|>)? 
44 //提取信息中的 IP 地址
45 (\d+)\.(\d+)\.(\d+)\.(\d+)
46 //取信息中的中国手机号码
47 (86)*0*13\d{9} 
48 //提取信息中的中国邮政编码
49 [1-9]{1}(\d+){5} 
50 //提取信息中的浮点数（即小数）
51 (-?\d*)\.?\d+ 
52 //提取信息中的任何数字
53 (-?\d*)(\.\d+)?
54 //电话区号
55 ^0\d{2,3}$
56 //腾讯 QQ 号
57 ^[1-9]*[1-9][0-9]*$ 
58 //帐号（字母开头，允许 5-16 字节，允许字母数字下划线）
59 ^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 
60 //中文、英文、数字及下划线
61 ^[\u4e00-\u9fa5_a-zA-Z0-9]+$
41、返回顶部的通用方法
 1 function backTop(btnId) {
 2     var btn = document.getElementById(btnId);
 3     var d = document.documentElement;
 4     var b = document.body;
 5     window.onscroll = set;
 6     btn.style.display = "none";
 7     btn.onclick = function() {
 8         btn.style.display = "none";
 9         window.onscroll = null;
10         this.timer = setInterval(function() {
11             d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
12             b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1);
13             if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set);
14             }, 10);
15     };
16     function set() {
17         btn.style.display = (d.scrollTop + b.scrollTop > 100) ? ‘block‘: "none"
18     }
19 };
20 backTop(‘goTop‘);
42、获得URL中GET参数值
 1 // 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]
 2 function get_get(){ 
 3     querystr = window.location.href.split("?")
 4     if(querystr[1]){
 5         GETs = querystr[1].split("&");
 6         GET = [];
 7         for(i=0;i<GETs.length;i++){
 8               tmp_arr = GETs.split("=")
 9               key=tmp_arr[0]
10               GET[key] = tmp_arr[1]
11         }
12     }
13     return querystr[1];
14 }
43、清除相同的数组
 1 String.prototype.unique=function(){
 2     var x=this.split(/[\r\n]+/);
 3     var y=‘‘;
 4     for(var i=0;i<x.length;i++){
 5         if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){
 6             y+=x+"\r\n"
 7         }
 8     }
 9     return y
10 };
44、按字母排序，对每行进行数组排序
1 function SetSort(){
2     var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序
3     var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序
4     K1.value=K1.value!=text?text:test;
5 }
45、字符串反序
function IsReverse(text){
    return text.split(‘‘).reverse().join(‘‘);
}
46、清除html代码中的脚本
 1 function clear_script(){
 2     K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?‘[\s\S]*?‘|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,"");
 3 }
 4 动态执行JavaScript脚本
 5  
 6 function javascript(){
 7     try{
 8       eval(K1.value);
 9     }catch(e){
10       alert(e.message);
11     }
12 }
47、金额大写转换函数
 1 function transform(tranvalue) {
 2     try {
 3         var i = 1;
 4         var dw2 = new Array("", "万", "亿"); //大单位
 5         var dw1 = new Array("拾", "佰", "仟"); //小单位
 6         var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用
 7         //以下是小写转换成大写显示在合计大写的文本框中     
 8         //分离整数与小数
 9         var source = splits(tranvalue);
10         var num = source[0];
11         var dig = source[1];
12         //转换整数部分
13         var k1 = 0; //计小单位
14         var k2 = 0; //计大单位
15         var sum = 0;
16         var str = "";
17         var len = source[0].length; //整数的长度
18         for (i = 1; i <= len; i++) {
19               var n = source[0].charAt(len - i); //取得某个位数上的数字
20               var bn = 0;
21               if (len - i - 1 >= 0) {
22                 bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字
23               }
24               sum = sum + Number(n);
25               if (sum != 0) {
26                 str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面
27                 if (n == ‘0‘) sum = 0;
28               }
29               if (len - i - 1 >= 0) { //在数字范围内
30                 if (k1 != 3) { //加小单位
31                       if (bn != 0) {
32                         str = dw1[k1].concat(str);
33                       }
34                       k1++;
35                 } else { //不加小单位，加大单位
36                       k1 = 0;
37                       var temp = str.charAt(0);
38                       if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位
39                       str = str.substr(1, str.length - 1);
40                       str = dw2[k2].concat(str);
41                       sum = 0;
42                 }
43               }
44               if (k1 == 3){ //小单位到千则大单位进一
45                 k2++;
46               }
47         }
48         //转换小数部分
49         var strdig = "";
50         if (dig != "") {
51               var n = dig.charAt(0);
52               if (n != 0) {
53                 strdig += dw[Number(n)] + "角"; //加数字
54               }
55               var n = dig.charAt(1);
56               if (n != 0) {
57                 strdig += dw[Number(n)] + "分"; //加数字
58               }
59         }
60         str += "元" + strdig;
61     } catch(e) {
62         return "0元";
63     }
64     return str;
65 }
66 //拆分整数与小数
67 function splits(tranvalue) {
68     var value = new Array(‘‘, ‘‘);
69     temp = tranvalue.split(".");
70     for (var i = 0; i < temp.length; i++) {
71         value = temp;
72     }
73     return value;
74 }
48、实现base64解码
 1 function base64_decode(data){
 2     var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
 3     var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];
 4     if (!data) { return data; }
 5     data += ‘‘;
 6     do { 
 7             h1 = b64.indexOf(data.charAt(i++));
 8             h2 = b64.indexOf(data.charAt(i++));
 9             h3 = b64.indexOf(data.charAt(i++));
10             h4 = b64.indexOf(data.charAt(i++));
11             bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
12             o1 = bits >> 16 & 0xff;
13             o2 = bits >> 8 & 0xff;
14             o3 = bits & 0xff;
15             if (h3 == 64) {
16                     tmp_arr[ac++] = String.fromCharCode(o1);
17             } else if (h4 == 64) {
18                     tmp_arr[ac++] = String.fromCharCode(o1, o2);
19             } else {
20                     tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
21             }
22     } while (i < data.length);
23     dec = tmp_arr.join(‘‘);
24     dec = utf8_decode(dec);
25     return dec;
26 }
49、实现utf8解码
 1 function utf8_decode(str_data){
 2     var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ‘‘;
 3     while (i < str_data.length) {
 4             c1 = str_data.charCodeAt(i);
 5             if (c1 < 128) {
 6                     tmp_arr[ac++] = String.fromCharCode(c1);
 7                     i++;
 8             } else if (c1 > 191 && c1 < 224) {       
 9                     c2 = str_data.charCodeAt(i + 1);
10                     tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
11                     i += 2;
12             } else {
13                     c2 = str_data.charCodeAt(i + 1);
14                     c3 = str_data.charCodeAt(i + 2);
15                     tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
16                     i += 3;
17             }
18     } 
19     return tmp_arr.join(‘‘);
20 }
50、获取窗体可见范围的宽与高
function getViewSize(){
    var de=document.documentElement;
    var db=document.body;
    var viewW=de.clientWidth==0 ?  db.clientWidth : de.clientWidth;
    var viewH=de.clientHeight==0 ?  db.clientHeight : de.clientHeight;
    return Array(viewW ,viewH);
}
51、判断鼠标是否移出事件
function isMouseOut(e, handler) {
    if (e.type !== ‘mouseout‘) {
            return false;
    }
    var reltg = e.relatedTarget ? e.relatedTarget : e.type === ‘mouseout‘ ? e.toElement : e.fromElement;
    while (reltg && reltg !== handler) {
            reltg = reltg.parentNode;
    }
    return (reltg !== handler);
}
52、半角转换为全角函数
function ToDBC(str){
    var result = ‘‘;
    for(var i=0; i < str.length; i++){
        code = str.charCodeAt(i);
        if(code >= 33 && code <= 126){
              result += String.fromCharCode(str.charCodeAt(i) + 65248);
        }else if (code == 32){
              result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);
        }else{
              result += str.charAt(i);
        }
    }
    return result;
}
53、全角转换为半角函数
function ToCDB(str){
    var result = ‘‘;
    for(var i=0; i < str.length; i++){
        code = str.charCodeAt(i);
        if(code >= 65281 && code <= 65374){
              result += String.fromCharCode(str.charCodeAt(i) - 65248);
        }else if (code == 12288){
              result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
        }else{
              result += str.charAt(i);
        }
    }
    return result;
}