function slideshow() {
    var i = 0;
    this_slide = 1;
    next_slide = 2;
    fade(this_slide, next_slide);
}

function fade(this_slide, next_slide) {
    // if next slide doesn't exist, start over
    var follow_slide = next_slide + 1;
    if (!slides[follow_slide]) { follow_slide = 1; }

    // fade slide in
    fadeIn(slides[this_slide]);

    // set the fadeout
    var fadeOut  = 'fadeOut("'+slides[this_slide]+'")';
    var tfadeOut = setTimeout(fadeOut, 4000);

    var fade     = 'fade('+next_slide+', '+follow_slide+')';
    var tfade    = setTimeout('fade('+next_slide+', '+follow_slide+')', 5500);
}

function fadeIn(slide) {
    document.getElementById(slide).style.display = 'block';
    YAHOO.example.init = function() {
       var anim = new YAHOO.util.Anim(slide, { opacity: { to: 1 } }, 1, YAHOO.util.Easing.easeIn);
       anim.animate(); 
    };
    
    YAHOO.util.Event.onAvailable(slide, YAHOO.example.init);
}

function fadeOut(slide) {
    YAHOO.example.init = function() {
       var anim = new YAHOO.util.Anim(slide, { opacity: { to: 0 } }, 1, YAHOO.util.Easing.easeOut);
       anim.animate(); 
    };
    
    YAHOO.util.Event.onAvailable(slide, YAHOO.example.init);
}