function showDemo(id,ref,vWidth,vHeight)

{

    if(!vHeight) vHeight = 600;

    if(!vWidth) vWidth = 800;

    var vTop = Math.ceil((screen.availHeight - vHeight)/2) - 25;

    var vLeft = Math.ceil((screen.availWidth - vWidth)/2);

    if(screen.width <= 800) {

      if(screen.width < 700) {

        alert("800x600 screen resolution or higher is recommended.");

      }

      vTop = 0;

      vLeft = 0;

      vWidth = screen.availWidth - 10;

      vHeight = screen.availHeight-46;

    }

  window.open("http://www.oracle.com/pls/ebn/swf_viewer.load?p_shows_id="+id+"&p_referred="+ref+"&p_width="+vWidth+"&p_height="+vHeight,"demoWin","width="+vWidth+",height="+vHeight+",resizable=0,top="+vTop+",left="+vLeft);

}