function popup(url,windowWidth,windowHeight,windowTitle){
	if (windowWidth == null) { windowWidth = 550 }
	if (windowHeight == null) { windowHeight = 600 }
	
	var newWindow = null;
	newWindow=window.open('','newWindow','width=' + windowWidth + ',height=' + windowHeight + ',status=no,toolbar=no,menubar=no,directories=no,location=no,scrollbars=yes,resizable=yes,alwaysRaised=yes,screenX=20,screenY=5,titlebar=yes,z-lock=yes,left=20,top=130');
	if (newWindow != null) {
		if (newWindow.opener == null){ newWindow.opener = self; } 
//		if (windowTitle != "") { newWindow.document.title=windowTitle; }
		newWindow.location.href=url;
		newWindow.focus();
	}
}