/************************************************************

  POPUP.JS

      Copyright:  (c) Jan Martin
      URL:        http://www.jan-martin.net
      E-Mail:     info@jan-martin.net

 ************************************************************/
 
function popup(url, windowname, width, height, scrolling, features)
{
    width = (width) ? width : screen.width / 2;
    height = (height) ? height : screen.height / 2;
    
    var screenX = (screen.width / 2 - width / 2);
    var screenY = (screen.height / 2 - height / 2);
    var features= "width=" + width + ", height=" + height + ", scrollbars=" + scrolling + ", status=no";
    features += ", screenX=" + screenX + ", left=" + screenX;
    features += ", screenY=" + screenY + ", top=" + screenY;
    var mywin = window.open(url, windowname, features);
    
    if(mywin)
    	mywin.focus();
    	
    return mywin;
}