// ****************************************************************************
// popupwindow
// ****************************************************************************
function popupwindow(url,name,windowWidth,windowHeight){
  myleft=(screen.width)?(screen.width-windowWidth)/2:100;
	mytop=(screen.height)?(screen.height-windowHeight)/2:100;
	properties = "width="+windowWidth+",height="+windowHeight+",location=false,resizable=false,toolbar=false,status=false,scrollbars=false,top="+mytop+",left="+myleft;
  window.open(url,name,properties)
}