//cookie操作函数
function SetMyCookie(name,value,expire) {    
    var exp = new Date();    
    exp.setTime(exp.getTime() + expire*60*1000);
    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
  
}    
   
function getMyCookie(name) {    
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));    
    if(arr != null) return unescape(arr[2]); return null;
}

//删除cookies
function delMyCookie(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();
}