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 + ")";
}
function shiftOpacity(id, millisec) {
    //if an element is invisible, make it visible, else make it ivisible
    if (document.getElementById(id).style.opacity == 0) {
        opacity(id, 0, 100, millisec);
    } else {
        opacity(id, 100, 0, millisec);
    }
}
function blendimage(divid, imageid, imagefile, millisec) {
    var speed = Math.round(millisec / 100);
    var timer = 0;
    //set the current image as background
    document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
    //make image transparent
    changeOpac(0, imageid);
    //make new image
    document.getElementById(imageid).src = imagefile;
    //fade in image
    var i = 0;
    for (i = 0; i <= 100; i++) {
        setTimeout("changeOpac(" + i + ",'" + imageid + "')", (timer * speed));
        timer++;
    }
}
function currentOpac(id, opacEnd, millisec) {
    //standard opacity is 100
    var currentOpac = 100;
    //if the element has an opacity set, get it
    if (document.getElementById(id).style.opacity < 100) {
        currentOpac = document.getElementById(id).style.opacity * 100;
    }
    //call for the function that changes the opacity
    opacity(id, currentOpac, opacEnd, millisec)
}
var slideCache = new Array();

function RunSlideShow(divid, imageid, imageFiles, displaySecs, base_path) {
    var imageSeparator = imageFiles.indexOf(";");
    var nextImage = imageFiles.substring(0, imageSeparator);
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + 1);
    //	document.cookie='imgNum=' +escape(nextImage)+';expires='+exdate.toGMTString();
    document.cookie = 'imgNum=' + escape(nextImage)
    var v = nextImage.substring(1, 2)
    v = parseInt(v);
    var n = v + 1;
    var p = v - 1;
    if (n > 6) {
        n = 1;
    }
    if (p < 1) {
        p = 6;
    }


    changeOpac(0, imageid);
    blendimage(divid, imageid, base_path + nextImage, 3000);

    var futureImages = imageFiles.substring(imageSeparator + 1, imageFiles.length) + ';' + nextImage;

    setTimeout("RunSlideShow('" + divid + "','" + imageid + "','" + futureImages + "'," + displaySecs + ",'" + base_path + "')", displaySecs * 1000);
    // Cache the next image to improve performance.

    imageSeparator = futureImages.indexOf(";");

    nextImage = futureImages.substring(0, imageSeparator);

    if (slideCache[nextImage] == null) {
        slideCache[nextImage] = new Image;
        slideCache[nextImage].src = base_path + nextImage;
    }
}