function createCookie(name,value,days) 
	{
		if (days) 
			{
				var date = new Date();
				date.setTime(date.getTime()+(days*24*60*60*1000));
				var expires = "; expires="+date.toGMTString();
			}
		else var expires = "";
		document.cookie = name+"="+value+expires+"; path=/";
	}
function readCookie(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 eraseCookie(name) 
	{
		createCookie(name,"",-1);
	}