var timer_id;
function scroll_iframe(frm,inc,dir) {
	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 + "')", 20);
		}
	}
}

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