var move_started = false;
function moveArrow()
{
	var arrow_number = Math.floor(Math.random() * 2) + 1;
	//arrow_number = 3;
	document.getElementById("img_arrow").src = "/images/index/arrow" + arrow_number + ".gif";
	
	move_started = true;
	setTimeout("moveArrow()", 1500);
}