if( !getCookie("guid") ){
	var name = "guid";
	var	d = new Date();
	t = d.getTime();
	ran = Math.floor((Math.random())*10000000);
	value = t.toString() + ran.toString();
	var expiry = new Date(t+10*365*24*60*60*1000);//cookieÓÐЧÆÚ10Äê
	var path = "/";
	var domain = ".51job.com";
	setCookie(name,value,expiry,path,domain);
}

function setCookie(name,value,expiry,path,domain,secure){
	var nameString = name + "=" + value;
	var expiryString = (expiry == null) ? "" : " ;expires = "+ expiry.toUTCString();
	var pathString = (path == null) ? "" : " ;path = "+ path;
	var domainString = (domain == null) ? "" : " ;domain = "+ domain;
	var secureString = (secure) ?";secure" :"";
	
	document.cookie = nameString + expiryString + pathString + domainString + secureString;
}

function getCookie(name) {
	var CookieFound = false;
	var start = 0;
	var end = 0;
	var CookieString = document.cookie;
	var i = 0;
	
	while (i <= CookieString.length) {
		start = i ;
		end = start + name.length;
		if (CookieString.substring(start, end) == name){
			CookieFound = true;
			break; 
		}
		i++;
	}
	
	if (CookieFound){
		start = end + 1;
		end = CookieString.indexOf(";",start);
		if (end < start)
			end = CookieString.length;
		return unescape(CookieString.substring(start, end));
	}
	return "";
}