js操作cookie

<script language=javascript> //获得coolie 的值function cookie(name){       var cookieArray=document.cookie.split("; "); //得到分割的cookie名值对       var cookie=new Object();       for (var i=0;i<cookieArray.length;i++){          var arr=cookieArray[i].split("=");       //将名和值分开          if(arr[0]==name)return unescape(arr[1]); //如果是指定的cookie，则返回它的值       }    return "";}function delCookie(name){//删除cookiedocument.cookie = name+"=;expires="+(new Date(0)).toGMTString();}function getCookie(objName){//获取指定名称的cookie的值var arrStr = document.cookie.split("; ");    for(var i = 0;i < arrStr.length;i ++){       var temp = arrStr[i].split("=");       if(temp[0] == objName) return unescape(temp[1]);    }}function addCookie(objName,objValue,objHours){      //添加cookie    var str = objName + "=" + escape(objValue);    if(objHours > 0){                               //为时不设定过期时间，浏览器关闭时cookie自动消失       var date = new Date();       var ms = objHours*3600*1000;       date.setTime(date.getTime() + ms);       str += "; expires=" + date.toGMTString();    }    document.cookie = str;}function SetCookie(name,value){//两个参数，一个是cookie的名子，一个是值   var Days = 30; //此 cookie 将被保存 30 天   var exp = new Date();    //new Date("December 31, 9998");   exp.setTime(exp.getTime() + Days*24*60*60*1000);   document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();} function getCookie(name){//取cookies函数         var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));    if(arr != null) return unescape(arr[2]); return null;} function delCookie(name){//删除cookie   var exp = new Date();   exp.setTime(exp.getTime() - 1);   var cval=getCookie(name);   if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();}</script>