function getCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}
function addCookie(name,value){
	var date = new Date();
	date.setTime(date.getTime()+(356*24*60*60*1000));
	var expires = " expires=" + date.toGMTString();
	document.cookie = name + "=" + encodeURIComponent(value) + "; path=/; domain="+ document.domain + ";" + expires;
}
function delCookie(name){
	if(!name) return false;
	if(name == "") return false;
	document.cookie = name + "=; path=/; domain="+ document.domain + "; expires=Thu, 01-Jan-1970 00:00:01 GMT;";
	return true;
}