// JScript File

var goto_top_type = -1;
var goto_top_itv = 0;

function goto_top_timer()
{
    var y = goto_top_type == 1 ? document.documentElement.scrollTop : document.body.scrollTop;
    //alert(y);
    var moveby = 15; // set this to control scroll seed. minimum is fast

    y -= Math.ceil(y * moveby / 100);
    if (y < 0)
        y = 0;

    if (goto_top_type == 1)
        document.documentElement.scrollTop = y;
    else
        document.body.scrollTop = y;

    if (y == 0)
    {
        clearInterval(goto_top_itv);
        goto_top_itv = 0;
    }
}

function goto_top()
{
    if (goto_top_itv == 0)
    {
        if (document.documentElement && document.documentElement.scrollTop)
            goto_top_type = 1;
        else if (document.body && document.body.scrollTop)
            goto_top_type = 2;
        else
            goto_top_type = 0;
        
        if (goto_top_type > 0)
            goto_top_itv = setInterval('goto_top_timer()', 10);
    }
}