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);
}

function windowOpen(url, title, width, height) 
{
	popUpWindow = window.open(url, title, "width="+width+",height="+height);
	popUpWindow.focus();
	return popUpWindow;
}

function windowClose(w) 
{
	w.close();
}

function sleep(ms)
{ 
	var t = (new Date()).getTime(); 
	var st = t + ms; 
	while((new Date()).getTime() < st){}; 
}