function createCookie(name,value,hours) {
	if (hours) {
		var date = new Date();
		date.setTime(date.getTime()+(hours*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);
}

function getURLVar(urlVarName) {
	var urlHalves = String(document.location).toLowerCase().split('?');
	var urlVarValue = '';
	if(urlHalves[1]) {
		var urlVars = urlHalves[1].split('&');
		for(var i=0; i<=(urlVars.length); i++) {
			if(urlVars[i]) {
				var urlVarPair = urlVars[i].split('=');
				if (urlVarPair[0] && urlVarPair[0] == urlVarName.toLowerCase()) {
					urlVarValue = urlVarPair[1];
				}
			}
		}
	}
	return urlVarValue;
}