// JavaScript Document

function TextScroll(scrollname, div_name, up_name, down_name)
{
    this.div_name = div_name;
    this.name = scrollname;
    this.scrollCursor = 0;
    this.speed = 5;
    this.timeoutID = 0;
    this.div_obj = null;
    this.up_name = up_name;
    this.dn_name = down_name;

    {
        if (document.getElementById) 
        {
            div_obj = document.getElementById(this.div_name);
            if (div_obj) 
            {
                this.div_obj = div_obj;
                this.div_obj.style.overflow = 'hidden';
            }
            div_up_obj = document.getElementById(this.up_name);
            div_dn_obj = document.getElementById(this.dn_name);
            if (div_up_obj && div_dn_obj) 
            {
                div_up_obj.onmouseover = function() { eval(scrollname + ".scrollUp();") };
                div_up_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
                div_dn_obj.onmouseover = function() { eval(scrollname + ".scrollDown();") };
                div_dn_obj.onmouseout = function() { eval(scrollname + ".stopScroll();") };
            }
        }
    }

    this.stopScroll = function() 
    {
        clearTimeout(this.timeoutID);
    }

    this.scrollUp = function() 
    {
        if (this.div_obj) 
        {
            this.scrollCursor = (this.scrollCursor - this.speed) < 0 ? 0 : this.scrollCursor - this.speed;
            this.div_obj.scrollTop = this.scrollCursor;
            this.timeoutID = setTimeout(this.name + ".scrollUp()", 60);
        }
    }

    this.scrollDown = function() 
    {
        if (this.div_obj) {
            this.scrollCursor += this.speed;
            this.div_obj.scrollTop = this.scrollCursor;
            this.timeoutID = setTimeout(this.name + ".scrollDown()", 60);
        }
    }

    this.resetScroll = function() 
    {
        if (this.div_obj) 
        {
            this.div_obj.scrollTop = 0;
            this.scrollCursor = 0;
        }
    }
}