var mastertabvar=new Object()
mastertabvar.baseopacity=0
mastertabvar.browserdetect=""

function showsubmenu(masterid, id){
    if (typeof highlighting!="undefined")
        clearInterval(highlighting)
    submenuobject=document.getElementById(id)
    mastertabvar.browserdetect=submenuobject.filters? "ie" : typeof submenuobject.style.MozOpacity=="string"? "mozilla" : ""
    hidesubmenus(mastertabvar[masterid])
    submenuobject.style.display="block"
    instantset(mastertabvar.baseopacity)
    highlighting=setInterval("gradualfade(submenuobject)",50)
}

function hidesubmenus(submenuarray){
    for (var i=0; i<submenuarray.length; i++)
        document.getElementById(submenuarray[i]).style.display="none"
}

function instantset(degree){
    if (mastertabvar.browserdetect=="mozilla")
        submenuobject.style.MozOpacity=degree/100
    else if (mastertabvar.browserdetect=="ie")
        submenuobject.filters.alpha.opacity=degree
}


function gradualfade(cur2){
    if (mastertabvar.browserdetect=="mozilla" && cur2.style.MozOpacity<1)
        cur2.style.MozOpacity=Math.min(parseFloat(cur2.style.MozOpacity)+0.1, 0.99)
    else if (mastertabvar.browserdetect=="ie" && cur2.filters.alpha.opacity<100)
        cur2.filters.alpha.opacity+=10
    else if (typeof highlighting!="undefined") //fading animation over
        clearInterval(highlighting)
}

function initalizetab(tabid){
    mastertabvar[tabid]=new Array()
    var menuitems=document.getElementById(tabid).getElementsByTagName("li")
    for (var i=0; i<menuitems.length; i++){
        if (menuitems[i].getAttribute("rel")){
            menuitems[i].setAttribute("rev", tabid) //associate this submenu with main tab
            mastertabvar[tabid][mastertabvar[tabid].length]=menuitems[i].getAttribute("rel") //store ids of submenus of tab menu
            if (menuitems[i].className=="selected")
                showsubmenu(tabid, menuitems[i].getAttribute("rel"))
            menuitems[i].getElementsByTagName("a")[0].onmouseover=function(){
                showsubmenu(this.parentNode.getAttribute("rev"), this.parentNode.getAttribute("rel"))
            }
        }
    }
}

// Rotator functions
var currentImage = -1;
var agent = navigator.userAgent.toLowerCase();
var appver = parseInt(navigator.appVersion);
var hasNativeBlend = 	(agent.indexOf('msie') != -1) && 
                        (agent.indexOf('opera') == -1) &&
                        (appver >= 4) && 
                        (agent.indexOf('msie 4') == -1) &&
                        (agent.indexOf('msie 5.0') == -1);

function random_int(i) {
        return Math.floor(i*(Math.random()%1));
}

function nextImage()
{
        if (currentImage === -1) 
                currentImage = random_int(images.length-1);
        else
                currentImage++;

        if (currentImage == images.length) currentImage = 0;

        if (hasNativeBlend) document.getElementById('imagerotator').style.filter = "blendTrans(duration=1)";
        if (hasNativeBlend) document.getElementById('imagerotator').filters.blendTrans.apply();
        document.getElementById('imagerotator').src = images[currentImage];
        if (hasNativeBlend) document.getElementById('imagerotator').filters.blendTrans.play();

        setTimeout('nextImage()', 6000);
}