function getCookie(name){
var str=document.cookie.split(";")
for(var i=0;i<str.length;i++){
var str2=str[i].split("=");
if($.trim(str2[0])==name)return unescape(str2[1]);
}
}
function delCookie(name)
{
var exp = new Date();
exp.setTime(exp.getTime() - 1);
var cval=getCookie(name);
if(cval!=null)
document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}
