function funcPreloadImages(theImages) {
    if  (document.images) {
        var i = 0;
        var aryImageArray = new Array();
        aryImageArray =  theImages.split(',');
        var imageObj = new Image();
        for(i=0; i<=aryImageArray.length-1; i++) {
            imageObj.src="/images/menu/" + aryImageArray[i];
        }
    }
}

function funcSwap(theImage, theNewImage)  { 
  document.images[theImage].src = "/images/menu/" + theNewImage;}