function changeStyle(val)
{
    if (val == 1)
    {
        document.styleSheets[1].disabled = false;
        document.styleSheets[2].disabled = true;
        document.styleSheets[3].disabled = true;
        document.styleSheets[4].disabled = true;
        document.getElementById('sgb_link').href = "index.php?color=k";
        document.getElementById('abt_link').href = "about.php?color=k";
        document.getElementById('con_link').href = "contact.php?color=k";
    }
    else if (val == 2)
    {
        document.styleSheets[1].disabled = true;
        document.styleSheets[2].disabled = false;
        document.styleSheets[3].disabled = true;
        document.styleSheets[4].disabled = true;
        document.getElementById('sgb_link').href = "index.php?color=b";
        document.getElementById('abt_link').href = "about.php?color=b";
        document.getElementById('con_link').href = "contact.php?color=b";
    }
    else
    {
        document.styleSheets[1].disabled = true;
        document.styleSheets[2].disabled = true;
        document.styleSheets[3].disabled = false;
        document.styleSheets[4].disabled = true;
        document.getElementById('sgb_link').href = "index.php?color=w";
        document.getElementById('abt_link').href = "about.php?color=w";
        document.getElementById('con_link').href = "contact.php?color=w";
    }
}

var timeoutID;

function scrollUp()
{
    clearTimeout(timeoutID);
    var tb = document.getElementById('textbox');
    tb.scrollTop = tb.scrollTop - 8;
    timeoutID = setTimeout("scrollUp();", 100);
}

function scrollDown()
{
    clearTimeout(timeoutID);
    var tb = document.getElementById('textbox');
    tb.scrollTop = tb.scrollTop + 8;
    timeoutID = setTimeout("scrollDown();", 100);
}

function stopScroll()
{
    clearTimeout(timeoutID);
}