function PopupOpen(theURL,winName,width,height,features) 
	{ 
		var availW = screen.availWidth;
		var availH = screen.availHeight;
		var popup = null;
		features+=',width=' + width + ',height=' + height;
		if (navigator.appName.indexOf('Microsoft') >= 0) 
			{
			features+=',left=' + ((availW - width - 10) * .5) + ',top=' + ((availH- height - 30) * .5);
			}
		else
			{
			features+=',screenX=' + ((screen.availWidth - width - 10) * .5)+ ',screenY=' + ((screen.availHeight- height - 30) * .5);
			}
		popup = window.open(theURL,winName,features);
		popup.focus();
	}