var wxwCookie = {
	setCookie:function (days, name, value)
	{
	    var exp  = new Date();
        exp.setTime(exp.getTime() + days*24*60*60*1000);
        document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
	},
	getCookie:function (name)
	{
    	var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
        if(arr=document.cookie.match(reg))
		{
			return unescape(arr[2]);
		}else{
			return null;
		}
	},
	delCookie:function (name)
	{
	    var exp = new Date();
        exp.setTime(exp.getTime() - 1);
    	var cval=getCookie(name);
        if(cval!=null)
		{
			document.cookie= name + "="+cval+";expires="+exp.toGMTString();
		}
	}
}