function preloadImages() 
{ 
	if (document.Images) 
	{
		var imgFiles = preloadImages.arguments;
		var preloadArray = new Array();
		for (var i=0; i<imgFiles.length; i++) 
		{
			preloadArray[i] = new Image;
			preloadArray[i].src = imgFiles[i];
		}
	}
}

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
}