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);
}