var currentImg = 1
var totalImg = 6;

function CheckHeight()
{
    var height;
    if (navigator.appName == "Netscape") {
        height = window.innerHeight;
    }
    else if (typeof window.innerWidth != 'undefined')
    {
        height = window.innerHeight;
    }
    else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0)
    {
        height = document.documentElement.clientHeight;
    }
    else
    {
        height = document.getElementsByTagName('body')[0].clientHeight;
    }
    
    var slide = document.getElementById("slideshow");
    height = height - 260;
    slide.style.height = height + "px";
    document.getElementById("footer").style.clear = "none";
}
function RollUp()
{
    if (currentImg < totalImg)
    {
        $(".slider img." + currentImg).slideUp("slow");
        currentImg = currentImg + 1;
    }
    else
    {
        var i = 1;
        for (i = 1; i < totalImg; i++)
        {
            currentImg = currentImg - 1;
            $(".slider img." + currentImg).slideDown("slow");
        }
    }
}
function RollDown()
{
    if (currentImg > 1)
    {
      currentImg = currentImg - 1;
      $(".slider img." + currentImg).slideDown("slow");
    }
    else
    {
        var i = 1;
        for (i = 1; i < totalImg; i++)
        {
            $(".slider img." + currentImg).slideUp("slow");
            currentImg = currentImg + 1;
        }
    }
}