function MM_openBrWindow(theURL, winName, features) { //v2.0
    window.open(theURL, winName, features);
}

function submitOnEnter(field, event) {
    var keycode;
    if (window.event) {
        keycode = window.event.keyCode;
    } else if (event) {
        keycode = event.which;
    } else {
        return true;
    }

    if (keycode == 13) {
        field.form.submit();
        return false;
    } else {
        return true;
    }
}

function changeStyle(elementId, styleName) {
    var element = document.getElementById(elementId);
    element.className = styleName;
}

function swap() {
    if (document.images) {
        for (var x = 0;
             x < swap.arguments.length;
             x += 2) {
            document[swap.arguments[x]].src = eval(swap.arguments[x + 1] + ".src");
        }
    }
}

function roll_over(img_name, img_src) {
    document[img_name].src = img_src;
}