function preloadImages() {
	  if (document.images) {
	    var imgFiles = preloadImages.arguments;
	    if (document.preloadArray==null) document.preloadArray = new Array();
	    var i = document.preloadArray.length;
	    with (document) for (var j=0; j<imgFiles.length; j++) if (imgFiles[j].charAt(0)!="#")
	    { preloadArray[i] = new Image;
	      preloadArray[i++].src = imgFiles[j];
	    }
	  }
	}

	function swapImgRestore() {
	  if (document.swapImgData != null)
	    for (var i=0; i<(document.swapImgData.length-1); i+=2)
	      document.swapImgData[i].src = document.swapImgData[i+1];
	}

	function swapImage() {
	  var i,j=0,objStr,obj,swapArray=new Array,oldArray=document.swapImgData;
	  for (i=0; i < (swapImage.arguments.length-2); i+=3) {
	    objStr = swapImage.arguments[(navigator.appName == 'Netscape')?i:i+1];
	    if ((objStr.indexOf('document.layers[')==0 && document.layers==null) ||
		(objStr.indexOf('document.all[')   ==0 && document.all   ==null))
	      objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
	    obj = eval(objStr);
	    if (obj != null) {
	      swapArray[j++] = obj;
	      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
	      obj.src = swapImage.arguments[i+2];
	  } }
	  document.swapImgData = swapArray; //used for restore
	}