window.onload = setScrollPosition;


function ImageOn(img)
{
    var length = img.length;
    var id = img.substring(0, (length - 4));
    var on = document.getElementById(id);
    on.src = './images/' + id + '_hover.png'
}
function ImageOff(img)
{
    var length = img.length;
    var id = img.substring(0, (length - 10));
    var off = document.getElementById(id);
    off.src = './images/' + id + '.png'
}
function getScrollPosition() 
{
    
    var x, y;

    if(document.all) {
        if(document.documentElement.scrollLeft)
            x = document.documentElement.scrollLeft;
        else
            x = document.body.scrollLeft;

        if(document.documentElement.scrollTop)
            y = document.documentElement.scrollTop;
        else
            y = document.body.scrollTop;
    }
    else {
        x = window.pageXOffset;
        y = window.pageYOffset;
    }

    document.getElementById('HiddenFieldX').value = x;
    document.getElementById('HiddenFieldY').value = y;

}
function setScrollPosition() 
{
    window.setInterval('getScrollPosition()', 200);
    var x = document.getElementById('HiddenFieldX').value;
    var y = document.getElementById('HiddenFieldY').value;
    if(x == null || y == null)
        alert('Bad Hidden Field Id!');
    else
        window.scrollTo(x, y);
}