js几个不错的函数$$()_javascript技巧

function map(a,f){f(a);}
function getRand(a,b)
{
if(a)
{
b=b?b:0;
return Math.floor(Math.random()*a+b);
}else
{
a = new Date();
return d.getTime();
}
}
function $(a){document.write(a);}
function $$()
{
var elements = new Array();
for (var i = 0; i < arguments.length; i++)
{
var element = arguments[i];
if (typeof element == 'string')
element = document.getElementById(element);

if (arguments.length == 1)
return element;

elements.push(element);
}
return elements;
}
function fGetCookie(name)
{
var cookieValue = "";
var search = name + "=";
if(document.cookie.length > 0)
{
offset = document.cookie.indexOf(search);
if (offset != -1)
{
offset += search.length;
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
cookieValue = unescape(document.cookie.substring(offset, end));
}
}
return cookieValue;
}
function J_get(name)
{
var js_get =self.window.document.location.href;
var start =js_get.indexOf(name + '=');
if (start == -1) return '';
var len = start + name.length + 1;
var end = js_get.indexOf('&',len);
if (end == -1) end = js_get.length;
return unescape(js_get.substring(len,end));
}
function writeCookie(name, value, hours)
{
var expire = "";
var domain = "; domain=jb51.net; path=/";
if(hours != "")
{
expire = new Date((new Date()).getTime() + hours * 60 * 60 * 1000);
expire = "; expires=" + expire.toGMTString();
}
document.cookie = name + "=" + escape(value) + domain;
}
function createXMLHttp()
{
var ret = null;
try {
ret = new ActiveXObject('Msxml2.XMLHTTP');
}
catch (e) {
try {
ret = new ActiveXObject('Microsoft.XMLHTTP');
}
catch (ee) {
ret = null;
}
}
if (!ret && typeof XMLHttpRequest != 'undefined')
ret = new XMLHttpRequest();
return ret;
}
function loadXmlToElement(fragment_url, element_id,mode,de)
{
var element = $$(element_id);
var xmlhttp = createXMLHttp();
var str;
xmlhttp.open("GET", fragment_url);
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
if(!mode)
{
str = xmlhttp.responseXML.getElementsByTagName("data")[0].childNodes[0].nodeValue;
if(!element.innerHTML)
{
try{
str = xmlhttp.responseXML.firstChild.childNodes[1].nodeValue;
}catch(e){}
}
}else if(mode == 'txt')
{
str = xmlhttp.responseText;
}
if(de) str = unescape(str);
element.innerHTML = str;
}
}
xmlhttp.send(null);
}
var oJson = new Object();
var fJson =
{
"data":{},//[0,y,yes,空值]:默认,[-1,n,no]:不运行flush(),
"file":{},//附加js代码文件
"str":{},//附加JS代码
"set":function(element,vars)
{
for(key in vars)
{
this[key][element] = vars[key];
}
},
"getSrc":function(element)
{
var rs = '';
if(this['data'][element])
{
if(this['data'][element] == 'n' || this['data'][element] == '-1' || this['data'][element] == 'no')
{
rs +='&gJsonData=n';
}
}
if(this['str'][element])
{
rs +='&gJsonDoStr='+escape(this['str'][element]);
}
if(this['file'][element])
{
rs +='&gJsonDoFile='+escape(this['file'][element]);
}
return rs;
},
"main":function(url,element,un)
{
un = un?un:0;
eval("oJson."+element+" = new fJson.__Json('"+url+"','"+element+"','"+un+"')" );
},
"__Json":function(url,element,un)
{
var a = document.getElementById("script_"+element)
if(!a)
{
a = document.createElement("script");
a.setAttribute("id","script_"+element);
}
a.un = un;
a.data = '';
a.src = url+((url.indexOf('?') == -1 )?'?':'&')+'gJson='+element+fJson.getSrc(element);
if(navigator.appVersion.indexOf("MSIE") == -1 )
{
document.getElementById(element).insertBefore(a,null);
}else
{
document.body.insertAdjacentElement("BeforeBegin",a);
}
return a;
},
"flush":function(element)
{
document.getElementById(element).innerHTML = (oJson[element].un)?unescape(oJson[element].data):oJson[element].data;
//oJson[element] = null;
}
}
/* 应用 */
function subPageSelect(b,e,d,a)//b开始 e结束 d默认 a动作
{
var shtml ='<select '+a+'>';
for(var i=b;i<=e;i++)
{
shtml+='<option value="'+i+'" '+(i==d?shtml+='selected':'')+'>'+i+'';
}
shtml+='';
return shtml;
}
function err(a,b,c)
{
if(b)
{
if(c)
{
a.src='http://www.gxlcms.com/space/imgs/all/thu_woman.gif';
}else
{
a.src='http://v.jb51.net:88/img/user_no_photo.gif';
}
}else
{
a.src='http://v.jb51.net:88/img/flv_no_photo.gif';
}
}
function img_onerr(a)
{
err(a);
}
function gowin(a)
{
document.location = a;
}
function CopyInBoard(hahaUrl,note)
{
note = note?note:'网址复制成功啦!';
window.clipboardData.setData('text',hahaUrl)
alert(note);
}
function fDoMask(a,f,s,c,p,color)//a元素 f刷新调函数 s样式 c内容 p透明度
{
a = $$(a);
p = p?p:75;
s = '';
color = color?color:'#FFFFFF';
if (a.innerHTML != "")
{
//window.onunload = fCheckStatus;
var objBrother = a.childNodes[0];
var b = document.createElement('DIV');
b.setAttribute('id','maskdiv');
b.style.textAlign = "center";
b.style.position = "absolute";
b.style.filter = "alpha(opacity="+p+")";
b.style.opacity = (p / 100);
b.style.MozOpacity = (p / 100);
b.style.KhtmlOpacity = (p / 100);
b.style.width = a['offsetWidth']+'px';
b.style.height = a['offsetHeight']+'px';
b.style.margin = "0px";
b.style.backgroundColor = color;
a.insertBefore(b,objBrother)
b.innerHTML = s;
}
}
function switchDisplay(obj1, obj2)
{
try
{
obj1 = $$(obj1);
obj2 = $$(obj2);
if(obj1.style.display=='')
{
obj1.style.display='none';
obj2.style.display='';
}
else
{
obj1.style.display='';
obj2.style.display='none';
}
}catch (ex)
{
}
}
function getFlashPlayer(vars,playUrl,id,w,h)
{
playUrl = playUrl?playUrl:'http://www.gxlcms.com/flashApp/56';
id = id?id:'siteFlvPlayer';
w = w?w:'440';
h = h?h:'371';
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0','width',w,'height',h,'id',id,'src',playUrl,'flashvars',vars,'quality','high','scale','noscale','wmode','transparent','name',id,'salign','lt','pluginspage','http://www.macromedia.com/go/getflashplayer','movie',playUrl); //end AC code
}
function f_js_playObject(a,h,s,player)
{
h = 'www.gxlcms.com';//#..
player = player?player:'/flashApp/v_player_site_fp7_5.swf';
player = 'http://'+h+player;
s = s?s:' width="100%" height="100%" ';

var _into = "";
_into += '';
_into += '';
_into += '';
_into += '';
_into += '';

document.getElementById('js_playObject').innerHTML = _into;
FcheckZoom();
}
function zoomMovie(){
var objId='videoPlayer';
var videoObject=document.all?document.all[objId]:document.getElementById(objId);
var maskForIe=document.all?document.all['maskForIe']:document.getElementById('maskForIe');
var videoPlayBack=document.all?document.all['flvPlayBack']:document.getElementById('flvPlayBack');
var playerInfo=document.all?document.all['PlayerInfo']:document.getElementById('PlayerInfo');
var searchBox=document.all?document.all['nav_search_form']:document.getElementById('nav_search_form');
var isMaxmized=/.*maxmized.*/i.test(videoObject.className);
if(isMaxmized){
videoObject.className='normalSize';
videoObject.style.position='';
videoPlayBack.firstChild.BGCOLOR='ffffff';
playerInfo.style.display='none';
maskForIe.style.display='none';
searchBox.style.display='';
}else{
window.scrollTo(0,0);
videoObject.className='maxmized';
videoObject.style.position='absolute';
if(navigator.appName.lastIndexOf('Explorer')!=-1){
videoObject.style.left=(document.body.parentNode.scrollWidth-600)/2;
videoObject.style.top='30';
playerInfo.style.display='';
maskForIe.style.display='';
}
videoPlayBack.firstChild.BGCOLOR='000000';
}
videoObject.onclick=function(){zoomMovie()}
}
function FcheckZoom()
{
var a = J_get('fs');
if (a==1)
{
zoomMovie();
}
}
/* 菜单 */
var isOverMainMenu = false;
var isOverSortMenu = false;
function showMenu(id){
var a = document.getElementById("MainMenu").getElementsByTagName("a");
for(var i=0;i a[i].onmouseover = function() {
if(this.className!="active") this.className = "hover";
showSortMenu(this.id);
isOverMainMenu=true;
}
a[i].onmouseout = function() {
if(this.className!="active") this.className = "";
setTimeout("showSortMenu('"+id+"')", 400);
isOverMainMenu=false;
}

if(a[i].id == id) {
a[i].className = "active";
showSortMenu(id);
} else {
a[i].className = "";
}
}
}
function showSortMenu(id){
var a = document.getElementById("SortMenu");
a.onmouseover = function(){
isOverSortMenu=true;
}
a.onmouseout = function(){
isOverSortMenu=false;
}
if(!isOverSortMenu && !isOverMainMenu) {
var b = document.getElementById("SortMenu").getElementsByTagName("ul");
for(var i=0;i<b.length;i++){
if(b[i].id == "SortMenu_"+id) {
b[i].className = "active";
} else {
b[i].className = "";
}
}
}
}
/*******************************/
var gLoginId = fGetCookie("member_id"); //登录用户ID
var gLoginHost = fGetCookie("host"); //登录主机名
var gLoginPass = fGetCookie("pass_hex"); //pass
var gLoginMember = fGetCookie("member_login"); //member_login
var gNewMail = fGetCookie("newmail"); //新邮件
var gKeepMail = fGetCookie("keepmail"); //是否检查邮件的标示
var gLoginUser = gLoginId.substring(0,gLoginId.indexOf("@")); //登录用户名
var gIsLogin = (gLoginHost != "" && gLoginUser != "" && gLoginPass !="" && gLoginMember != "")?true:false; //是否已经登录
var basedir = 'http://v.jb51.net:88/photo/';
var userDir = fCaculateUrl(gLoginUser);
function fIsLogin()
{
return (fGetCookie("host") != "" && fGetCookie("member_id") != "" && fGetCookie("pass_hex") !="" && fGetCookie("member_login") != "")?true:false;
}
function fCaculateUrl(userName)
{
var level1 = 0;
var level2 = 0;
var k = userName.length;
//var arr = new Array();
for(var i=0;i<k;i++)
{
level1 += userName.charCodeAt(i)*i;
level2 += userName.charCodeAt(i)*(2*i+1);
}
level1 = level1 % 100;
level2 = level2 % 100;
return level1+'/'+level2;
}
document.domain = "jb51.net";
window.focus();