function resizeIframe() {
    var frame = document.getElementById('frame')
    if (frame != null) {
        frame.style.height = (frame.contentWindow.document.body.scrollHeight + 30) + "px";
    }
};
var millsecsBetweenChange = 5000;
var $banner;
$(document).ready(function() {
    $banner = $("#banner");
    setTimeout("rotateBannerImage(2)", millsecsBetweenChange);
})
function rotateBannerImage(index) {
    if (index > 6)
        index = 1;
    $banner.fadeOut(1000, function() {
        $banner.css("background-image", "url(/images/banner/nxs_banner_pic" + index + ".jpg)");
        $banner.fadeIn(1000, function() {
            setTimeout("rotateBannerImage(" + ++index + ")", 3000);
        });
    });
}
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;