/**
 * rollover.js
 */

window.onload = registerRollover;

function registerRollover() {
    if (!document.getElementById) return;

    var temp_array = [];
    var img_array  = document.getElementsByTagName('img');

    for (var i = 0; i < img_array.length; i++) {
        var img = img_array[i];
        if (img.className != 'imgover') continue;

        var src_down = img.src;
        var src_up   = src_down.replace('-down', '-up');

        var img2 = new Image();
        img2.src = src_up;
        img.down_str = src_down;
        img.up_str   = src_up;

        temp_array.push(img2);

        img.onmouseover = function () {
            this.src = this.up_str;
        };
        img.onmouseout = function () {
            this.src = this.down_str;
        };
    }
}