var ScrnSize = "UnCommon"

  if (navigator.appVersion.indexOf("4.") != -1 && 
      navigator.appName.indexOf("Explorer") != -1) {
     ScrnSize = screen.width + "x" + screen.height;
  }
  if (navigator.appVersion.indexOf("4.") != -1 && 
      navigator.appName.indexOf("Netscape") != -1) {
     ScrnSize = screen.width + "x" + (screen.height + 19); //Netscape sees 19 pixels less on Height
  }
  switch(ScrnSize) {
    case "800x600":   document.write('<body background="images/bg/800-600.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    case "1024x768":  document.write('<body background="images/bg/1024-768.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    case "1152x864":  document.write('<body background="images/bg/1024-768.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    case "1280x960":  document.write('<body background="images/bg/1280-960.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
  	case "1280x1024": document.write('<body background="images/bg/1280-960.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    case "1600x1200": document.write('<body background="images/bg/1600-1200.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    case "1600x1280": document.write('<body background="images/bg/1600-1200.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
	case "1680x1050": document.write('<body background="images/bg/1600-1200.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
    default:          document.write('<body background="images/bg/1280-960.gif" leftmargin="0" topmargin="0" style="background-attachment: fixed">');
  }