var WindowPopupHandle;

 function NewWindow(URL, WindowName, Width, Height, Scrollable) {
 		var WindowFeatures;
		if (WindowPopupHandle) {
			WindowPopupHandle.close(); 
		}
		WindowFeatures = '"width=' + Width +',height=' + Height + '"';
 		WindowPopupHandle=window.open(URL,WindowName,"width=" + Width + ",height=" + Height + ",scrollbars=" + Scrollable);
		if (WindowPopupHandle) {
			setTimeout('WindowPopupHandle.focus(); ', 200);
		}
  }