function wt_setCookie(name, value, expireDays){
	var exdate = new Date();
	exdate.setDate(exdate.getDate()+expireDays);
	document.cookie = name+"="+value+"; expires="+exdate.toGMTString()+"; path=/";
}

function wt_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;
}