function __scroll() {
    clearTimeout(Timer);
    old_scroll = document.getElementById('slider_holder').scrollLeft;
    document.getElementById('slider_holder').scrollLeft += (scroll_speed*scroll_dir);
    
    if(document.getElementById('slider_holder').scrollLeft <= 0)
        document.getElementById('previous_button').style.display='none';
    else
        document.getElementById('previous_button').style.display='block';
    if(document.getElementById('slider_holder').scrollLeft >= (new_width - 424))
        document.getElementById('next_button').style.display='none';  
    else
        document.getElementById('next_button').style.display='block';
        
    if(old_scroll != document.getElementById('slider_holder').scrollLeft) {
        
        if(document.getElementById('slider_holder').scrollLeft % 424 == 0) {
            scroll_speed = 8;
            //Timer = setTimeout('__scroll()', nextTimeout);
        } else {
            Timer = setTimeout('__scroll()', scrollTimeout);
        }

        
        
        return;
    } 
    
    if(old_scroll == new_width - 424 || old_scroll == 0) {
        scroll_dir = -1*scroll_dir;
        scroll_speed = 8;
        
        //__scroll();
    }
    
    
}