function popImage (imageURL, caption)
{
  var windowTop = 100;                // Top position of popup
  var windowLeft = 100                // Left position of popup
  var defaultWidth = 414;             // Default width (for browsers that cannot resize)
  var defaultHeight = 500;            // Default height (for browsers that cannot resize)
  var onLoseFocusExit = true;         // Set if window to exit when it loses focus
  var undefined;

  // Set up the window open options
  var Options = "width=" + defaultWidth + ",height=" + defaultHeight + ",top=" + windowTop + ",left=" + windowLeft + ",resizable"

  // Now write the HTML markup to the new window, ensuring that we insert the
  // parameter URL of the image and the parameter description of the image in
  // the right place.
  var myScript = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n" +
    "<html>\n" +
    "<head>\n" +
    "<title>" + caption + "\</title>\n" +
    "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-2\">\n" +
    "<script language=\"JavaScript\" type=\"text/javascript\">\n" +
    "function resizewindow () {\n" +
    "  var width = document.myimage.width;\n" +
    "  var height = document.myimage.height;\n";

  // Netscape
  if (navigator.appName.indexOf("Netscape") != -1) {
    myScript = myScript +  "  window.innerHeight = height;\n  window.innerWidth = width;\n"
  }

  // Opera
  else if (navigator.appName.indexOf("Opera") != -1) {
    myScript = myScript +  "  window.resizeTo (width+12, height+41);\n" // 31
  }

  // Microsoft
  else if (navigator.appName.indexOf("Microsoft") != -1)
  {
/*@cc_on
   @if (@_jscript_version > 5.6)
		myScript = myScript + "  window.resizeTo (width+12, height+71);\n"
   @else
		myScript = myScript + "  window.resizeTo (width+12, height+31);\n"
   @end
@*/
  }

  // Assume a frig factor for any other browsers
  else {
    myScript = myScript + "  window.resizeTo (width+14, height+34);\n"
  }

  myScript = myScript + "}\n" + "window.onload = resizewindow;\n" +
    "</script>\n</head>\n" + "<body ";

  // If the window is required to close when it loses focus.
  if (onLoseFocusExit) {myScript = myScript + "onblur=\"self.close()\" ";}

  myScript = myScript + "style=\"margin: 0px; padding: 0px;\">\n" +
    "<a href=\"javascript:close();\" style=\"border:0px\"><img style=\"border:0px\" src=\"" + imageURL + "\" alt=\"" + caption + "\" title=\"" + caption + "\" name=\"myimage\"></a>\n" +
    "</body>\n" +  "</html>\n";

  // Diagnostic - uncomment the next line if you wish to see the script generated.
  //alert (myScript);

  // Create the popup window
  var imageWindow = window.open ("","imageWin",Options);
  imageWindow.document.write (myScript);
  imageWindow.document.close ();
  if (window.focus) imageWindow.focus();
  return false;
}
