js里对php存贮的cookie进行读取和删除
/* 读取cookie */
function getCookie(name){
var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
if(arr=document.cookie.match(reg))
return unescape(arr[2]);
else
return null;
}
/* 清除cookie */
function delCookie(name){
var date=new Date();
date.setTime(date.getTime()-10000);
document.cookie=name+"=v; expire="+date.toGMTString()+"; path=/";
}