var ArrowObject = null;	
var timer_id;
function scroll_iframe(frm,inc,dir,iframe_width) {
//if(obj) ArrowObject  = obj;
//alert(document.getElementById("spinback"));
//var iframe_width =  320;
var scroll_width =  window.frames[frm].document.body.scrollWidth;
var scroll_left =  window.frames[frm].document.body.scrollLeft;
var delta = scroll_width - scroll_left;
document.getElementById("spinback").style.cursor = (scroll_left==0)?'default':'pointer';
document.getElementById("spinforword").style.cursor = (delta == iframe_width)?'default':'pointer';
//if (ArrowObject) ArrowObject.style.cursor = 'default';
//alert(inc);
  if (timer_id) clearTimeout(timer_id);
  if (window.frames[frm]) {
    if (dir == "v") window.frames[frm].scrollBy(0, inc);
    else window.frames[frm].scrollBy(inc, 0);
    timer_id = setTimeout("scroll_iframe('" + frm + "'," + inc + ",'" + dir + "',"+iframe_width+")", 10);
  }
}

function stopScroll() { if (timer_id) clearTimeout(timer_id); }