网页可见区域宽：document.body.clientWidth网页可见区域高：document.body.clientHeight网页可见区域宽：document.body.offsetWidth(包括边线的宽)网页可见区域高：document.body.offsetHeight(包括边线的宽)网页正文全文宽：document.body.scrollWidth网页正文全文高：documen...

window.onload=function(){functionlimit(){varendtime=newDate('2015/02/14,00:00:00'),nowtime=newDate(),theEnd=parseInt((endtime.getTime()-nowtime.getTime())/1000),t=document.getEleme...

functionsetCookieExpires(CookieName,expires){varexp='';if(expires==''){exp='';//expires不设置，浏览器关闭时过期}else{exp=newDate();exp.setTime(exp.getTime()+expires);//增加日期exp=";expi...

(function(){varbrowser='other',system='other',device='PC';varpf=navigator.platform,ua=navigator.userAgent,href=window.location.href;//埋点地址varroot='';//开关varON=false;//window系统匹...

window.onbeforeunload=function(){if(document.all){if(event.clientY<0){return"确定要离开吗？";}}else{return"确定要离开吗？";}}

functionisIE(){if(!!window.ActiveXObject||"ActiveXObject"inwindow){returntrue;}else{returnfalse;}}functionIEVersion(){varrv=-1;if(navigator.appName=='MicrosoftInternetExplorer'){varua...

functionis_pc(){varos=newArray("Android","iPhone","WindowsPhone","iPod","BlackBerry","MeeGo","SymbianOS");//其他类型的移动操作系统类型，自行添加varinfo=navigator.userAgent;varlen=os.length;for(vari=0...

//扩展Date的format方法Date.prototype.format=function(format){varo={"M+":this.getMonth()+1,"d+":this.getDate(),"h+":this.getHours(),"m+":this.getMinutes(),"s+":this.getSeconds()...

微信号：js_gcs大多数计算机语言，都有一个表示"无"的值，比如，C语言的NULL，Java语言的null，Python语言的none，Ruby语言的nil。有点奇怪的是，JavaScript语言居然有两个表示"无"的值：undefined和null。这是为什么？一、相似性在JavaScript中，将一个变量赋值为undefined或null，老实说，几乎没区别。vara=undefine...

javascript检测客户端是否安装了MSN,Skype,qq软件的通用方法代码如下：functioncheckInstalled(m){switch(m){case'msn':try{newActiveXObject("MSNMessenger.P4QuickLaunch");returntrue;}catch(e){returnfalse;}case'skype':tr...