/*
 * fade.js
 */

window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

var d = document;
var imgs = new Array();
var zInterval = null;
var current=0;
pause=false;

function so_init() {
    if(!d.getElementById || !d.createElement){
        return;
    }

    imgs = d.getElementById("header").getElementsByTagName("img");
    for(i=1;i<imgs.length;i++){
        imgs[i].xOpacity = 0;
    }

    imgs[0].style.display = "block";
    imgs[0].xOpacity = .99;

    setTimeout(so_xfade, 4000);
}

function so_xfade() {
    cOpacity = imgs[current].xOpacity;
    nIndex = imgs[current+1]?current+1:0;

    nOpacity = imgs[nIndex].xOpacity;

    cOpacity-=.05;
    nOpacity+=.05;

    imgs[nIndex].style.display = "block";
    imgs[current].xOpacity = cOpacity;
    imgs[nIndex].xOpacity = nOpacity;

    setOpacity(imgs[current]);
    setOpacity(imgs[nIndex]);

    if(cOpacity<=0){
        imgs[current].style.display = "none";
        current = nIndex;
        setTimeout(so_xfade,3000);
    }else{
        setTimeout(so_xfade,50);
    }

    function setOpacity(obj) {
        if(obj.xOpacity>.99) {
            obj.xOpacity = .99;
            return;
        }

        obj.style.opacity = obj.xOpacity;
        obj.style.MozOpacity = obj.xOpacity;
        obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
    }
}