var fadein;
var fadeout;

function pageLoad()
{
    if(document.getElementById("MainSlideshowDataList_ctl00_MainImage")){
        var ss=$find("ss1");
        ss.add_slideChanging(onChanging);    
    
        var ae=$find("ae1");
        var be=ae.get_OnLoadBehavior();
        var an=be.get_animation();
        fadein=an.get_animations()[1];
        fadeout=an.get_animations()[0];
    
        fadein.set_duration(0.5);
        fadeout.set_duration(0.5);
    }
    
     if(document.getElementById("PreviewSlideshowDataList_ctl00_ImagePreviewBig")){
        var ss=$find("ss2");
        ss.add_slideChanging(onChanging);    
    
        var ae=$find("ae2");
        var be=ae.get_OnLoadBehavior();
        var an=be.get_animation();
        fadein=an.get_animations()[1];
        fadeout=an.get_animations()[0];
    
        fadein.set_duration(0.5);
        fadeout.set_duration(0.5);
    }
}
function onChanging(sender, args)
{
    fadein.play();
    //window.setTimeout("fadeout.play()", 7000);
}