function createCookie(name,value,days) 
{
	//vl = (value) ? " checked " : " " ;
	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 ;
	//alert(document.cookie );
		
}

function readCookie(sName) 
{
	var aCookie = document.cookie.split("; ");
	for (var i=0; i < aCookie.length; i++)
	{
		// a name/value pair (a crumb) is separated by an equal sign
		var aCrumb = aCookie[i].split("=");
		if (sName == aCrumb[0]) 
		return unescape(aCrumb[1]);
	}

	// a cookie with the requested name does not exist
	return null;

}

function eraseCookie(name) 
{
	createCookie(name,"",-1);
}