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

function readCookie(name)
{
    /*alert("readCookie");*/

	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);
}