function Trim(s) {
	if (s == "")
		return s;
		
	whitespace = " \t\r\n";
	
	// remove leading whitespace
	while ((whitespace.indexOf(s.substring(0, 1)) > -1) && (s.length > 0)) {
		s = s.substring(1, s.length);
	}
	
	// remove trailing whitespace
	while ((whitespace.indexOf(s.substring(s.length-1, s.length)) > -1) && (s.length > 0)) {
		s = s.substring(0, s.length-1);
	}
	
	return s;
}

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);
}