function centerPopup(popup_name,popup_url,popup_width,popup_height,scrolls, menubars, myWidth,myHeight)
{
	if(!myWidth) {myWidth = 10;}
	if(!myHeight){myHeight = 50;}
	if(!scrolls){scrolls = 'no';}
	if(!menubars){menubars = 'no';}
	var popup_left = (window.screen.width/2)  - (popup_width/2 + myWidth);
	var popup_top  = (window.screen.height/2) - (popup_height/2 + myHeight);
	var fenster = window.open(popup_url ,popup_name,"toolbar=no,location=no,status=no,menubar=" + menubars + ",scrollbars=" + scrolls + ",resizable=no,width=" + popup_width + ",height=" + popup_height + ",left=" + popup_left + ",top=" + popup_top + ",screenX=" + popup_left + ",screenY=" + popup_top);
	fenster.focus();
}

function resetSearchValue(object, serachValue)
  {
  if (object.value==''){object.value=serachValue;}
  }