/************************************************************/
/*  File: NavRollover.js                                    */
/*  Author: Damien Rider                                    */
/*  Date: 29th June, 2007                                   */
/*  Purpose: To control the sub nav function of Aus.Idol    */
/*           website. Allowing the sub nav to swap when     */
/*           reuired and return to the original sub nav.    */
/************************************************************/
var navCurrent = null;
var arPrimaryNav = null;
var navTimeout = null;
function setupNavFunction() {    
    arPrimaryNav = new Array();
    var navPrimary = document.getElementById('nav-primary') ;
    if (navPrimary) {
        var navTab = navPrimary.getElementsByTagName('li') ;
        for (var i = 0; i < navTab.length; i++) {
            arPrimaryNav.push(navTab[i]);
        
            if(navTab[i].attachEvent) {
                navTab[i].attachEvent('onmouseover',toggleMenu);
                navTab[i].attachEvent('onmouseout',releaseSubMenu);
            }
            else if(navTab[i].addEventListener) {
                navTab[i].addEventListener('mouseover',toggleMenu,false);
                navTab[i].addEventListener('mouseout',releaseSubMenu,false);
            }
            else {
                navTab[i].onMouseOver = toggleMenu;
                navTab[i].onMouseOut = releaseSubMenu;
            }
        }    
        
        var subNav = document.getElementById('nav-sub');
        
        if(subNav.attachEvent) {
            subNav.attachEvent('onmouseover',checkSubMenu);
            subNav.attachEvent('onmouseout',releaseSubMenu);
        }
        else if(subNav.addEventListener) {
            subNav.addEventListener('mouseover',checkSubMenu,false);
            subNav.addEventListener('mouseout',releaseSubMenu,false);
        }
        else {
            subNav.onMouseOver = checkSubMenu;
            subNav.onMouseOut = releaseSubMenu;
        }
    }
}
function toggleMenu(e) {
    if(navTimeout != null) {
        clearTimeout(navTimeout);
        navTimeout = null;
    }
    
    var targ;
    if (!e) var e = window.event;
    if (e.target) targ = e.target;
    else if (e.srcElement) targ = e.srcElement;
    if (targ.nodeType == 3) // defeat Safari bug
        targ = targ.parentNode;
    
    var elem = targ.parentNode;
    var newNav = null;
    for(var i = 0; i < arPrimaryNav.length; i++) {
        if(arPrimaryNav[i] == elem) {
            newNav = 'nav-sub-' + (i+1);
            if(newNav != navCurrent) {
               if(navCurrent != null) document.getElementById(navCurrent).style.display = 'none';
               document.getElementById(newNav).style.display = 'inline';
               navCurrent = newNav;
            }
        }
    }
}
function releaseSubMenu() {
    if(navTimeout != null) {
        clearTimeout(navTimeout);
        navTimeout = null;
    }
    
    navTimeout = setTimeout('showOriginal()',500);
}
function checkSubMenu(e) {
    if(navTimeout != null) {
        clearTimeout(navTimeout);
        navTimeout = null;
    }
}
function showOriginal() {
    document.getElementById(navCurrent).style.display = 'none';
    
    navCurrent = null;
}
setupNavFunction();