var fadeinCurrentSlide = 0;

function fadeinInit(id, fadeins,startslide) {
    setInterval("fadein('" + id + "'," + fadeins + ")", 4000);
}

function fadein(id, fadeins) {
    if (fadeinCurrentSlide == 0) {
        fadeinCurrentSlide = 1;
    }
    var numSlides = fadeins.length;
    var src = fadeins[window.fadeinCurrentSlide - 1];
    var obj = document.getElementById(id);
    var style = document.getElementById(id).style;

    obj.setAttribute("src", src);
    opacity(id, 0, 100, 1000);

    window.fadeinCurrentSlide = window.fadeinCurrentSlide == numSlides ? 1 : window.fadeinCurrentSlide + 1;
}

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame 
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens 
    if (opacStart > opacEnd) {
        for (i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')", (timer * speed));
            timer++;
        }
    } else if (opacStart < opacEnd) {
        for (i = opacStart; i <= opacEnd; i++) {
            setTimeout("changeOpac(" + i + ",'" + id + "')", (timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers 
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}