var aryImages = new Array(5);

aryImages[0] = "/img/5-bridges_HOME_On.gif";
aryImages[1] = "/img/5-bridges_SERVICES_On.gif";
aryImages[2] = "/img/5-bridges_ABOUT_On.gif";
aryImages[3] = "/img/5-bridges_CAREERS_On.gif";
aryImages[4] = "/img/5-bridges_CONTACT_On.gif";


for (i = 0; i < aryImages.length; i++) {
    var preload = new Image();
    preload.src = aryImages[i];
}


function swapImg(myImg, imgIndex) {
    alert(myImg);
    document['imgHome'].src = aryImages[imgIndex];
}


var timeout = 500;
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;

function fblogin() {

    alert('Your Login Information Not Found');
}