if (document.images) {

    img1_on = new Image(); img1_on.src = "images/2b.jpg";
    img1_off = new Image(); img1_off.src = "images/2.jpg";

    img2_on = new Image(); img2_on.src = "images/3b.jpg";
    img2_off = new Image(); img2_off.src = "images/3.jpg";

    img3_on = new Image(); img3_on.src = "images/4b.jpg";
    img3_off = new Image(); img3_off.src = "images/4.jpg";

    img4_on = new Image(); img4_on.src = "images/5b.jpg";
    img4_off = new Image(); img4_off.src = "images/5.jpg";

    img5_on = new Image(); img5_on.src = "images/6b.jpg";
    img5_off = new Image(); img5_off.src = "images/6.jpg";

    img6_on = new Image(); img6_on.src = "images/b2b.jpg";
    img6_off = new Image(); img6_off.src = "images/b2.jpg";

    img7_on = new Image(); img7_on.src = "images/b3b.jpg";
    img7_off = new Image(); img7_off.src = "images/b3.jpg";

    img8_on = new Image(); img8_on.src = "images/b4b.jpg";
    img8_off = new Image(); img8_off.src = "images/b4.jpg";

}

function movr(k) {

    if (document.images)

        eval('document.img' + k + '.src=img' + k + '_on.src');

}

function mout(k) {

    if (document.images)

        eval('document.img' + k + '.src=img' + k + '_off.src');
}


var timeout = 150;
var closetimer = 0;
var ddmenuitem = 0;

// open hidden layer
function mopen(id) {
    // cancel close timer
    mcancelclosetime();

    // close old layer
    if (ddmenuitem) ddmenuitem.style.visibility = 'hidden';

    // get new layer and show it
    ddmenuitem = document.getElementById(id);
    ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose() {
    if (ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime() {
    closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime() {
    if (closetimer) {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}

// close layer when click-out
document.onclick = mclose;