// JavaScript Document
function openWindow(url, windowName, width, height) {
	var x = (window.screen.width - width) / 2;
	var y = (window.screen.height - height) * 1/3;

	newWindow = window.open(url,windowName,'width=' + width + ',height=' + height + ',resizable=no,scrollbars=no,toolbars=no,menubar=no,left=' + x + ',top=' + y);
     if (window.focus) {newWindow.focus()}
	  
	return newWindow;
}