function newImage(arg) {
    if (document.images) {
        rslt = new Image();
        rslt.src = arg;
        return rslt;
    }
}

function changeImages() {
    if (document.images && (preloadFlag == true)) {
        for (var i=0; i<changeImages.arguments.length; i+=2) {
	        document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
        }
    }
}

var preloadFlag = false;
function preloadImages() {
    if (document.images) {
        categories2_02_over = newImage("/images/categories2_02-over.gif");
        categories2_04_over = newImage("/images/categories2_04-over.gif");
        categories2_05_over = newImage("/images/categories2_05-over.gif");
        categories2_06_over = newImage("/images/categories2_06-over.gif");
        categories2_07_over = newImage("/images/categories2_07-over.gif");
        categories2_08_over = newImage("/images/categories2_08-over.gif");
        categories2_09_over = newImage("/images/categories2_09-over.gif");
        categories2_10_over = newImage("/images/categories2_10-over.gif");
        categories2_11_over = newImage("/images/categories2_11-over.gif");
        categories2_12_over = newImage("/images/categories2_12-over.gif");
        categories2_13_over = newImage("/images/categories2_13-over.gif");
        categories2_15_over = newImage("/images/categories2_15-over.gif");
        categories2_16_over = newImage("/images/categories2_16-over.gif");
        categories2_17_over = newImage("/images/categories2_17-over.gif");
        categories2_18_over = newImage("/images/categories2_18-over.gif");
        categories2_19_over = newImage("/images/categories2_19-over.gif");
        categories2_20_over = newImage("/images/categories2_20-over.gif");
        categories2_21_over = newImage("/images/categories2_21-over.gif");
        categories2_23_over = newImage("/images/categories2_23-over.gif");
        categories2_24_over = newImage("/images/categories2_24-over.gif");
        categories2_25_over = newImage("/images/categories2_25-over.gif");
        categories2_26_over = newImage("/images/categories2_26-over.gif");
        categories2_27_over = newImage("/images/categories2_27-over.jpg");
        preloadFlag = true;
    }
}