//
//
// This file contains the javascript routines for the
// dropdown menus.
//
// Increase "delay" to increase the stickiness of
// the dropdown menus. Delay must be set higher for
// Netscape 4 due to its incomplete DHTML support.
//
//


var delay = 250
var headerOn = new Array(numMenus)
var menuOn = new Array(numMenus)

function menuDropdown() {
    for (i = 0; i < numMenus; i++) {
        headerOn[i] = false
        menuOn[i] = false

        show("menuHead" + i + "a")

        var menu = document.getElementById("menu" + i);
        if (menu != undefined && document.body.clientHeight && window.attachEvent && navigator.appVersion.substr(22, 3) != "5.0") {
            var menuShim = document.createElement('IFRAME');
            menuShim.id="shim" + i;
            menuShim.src='javascript:false;';
            menuShim.style.position = 'absolute';
            menuShim.style.top = 0;
            menuShim.style.left = 0;
            menuShim.style.width = menu.clientWidth;
            menuShim.style.height = menu.clientHeight;
            menuShim.style.border = 'none';
            menuShim.style.zIndex = -1;
            menuShim.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';
            menu.appendChild(menuShim);
            menu.style.overflow = "hidden";
        }
    }

    show("navBground")

    if (is.nav4) {
        delay = 1500
    }

    checkMenu()
}

function menuRoll(which, status) {
    if (status) {
        show("menu" + which)
        headerOn[which] = true
        menuOn[which] = true
        rollHead(which, true)
    } else {
        headerOn[which] = false
        menuOn[which] = false
    }
}

function getPageOffsetLeft(el) {
    var x;
    x = el.offsetLeft;
    if (el.offsetParent != null)
        x += getPageOffsetLeft(el.offsetParent);
    return x;
}

function getPageOffsetTop(el) {
    var y;
    y = el.offsetTop;
    if (el.offsetParent != null) {
        y += getPageOffsetTop(el.offsetParent);
    }
    return y;
}

function roll(obj, which, status) {
    if (status) {
        obj.className = "bgOn"
    } else {
        obj.className = "bgOff"
    }
    menuOn[which] = status
}

function roll4(which, status) {
    if (is.nav4) {
        menuOn[which] = status
    }
}

function checkMenu() {
    var anyOn = false;
    for (i = 0; i < numMenus; i++) {
        if ((headerOn[i]) || (menuOn[i])) {
            show("menu" + i)
            rollHead(i, true)
            anyOn = true;
        } else {
            hide("menu" + i)
            rollHead(i, false)
        }
    }
    setTimeout("checkMenu()", delay)
}

function rollHead(which, status) {
    if (status) {
        show("menuHead" + which + "b")
        hide("menuHead" + which + "a")
    } else {
        show("menuHead" + which + "a")
        hide("menuHead" + which + "b")
    }
}