function ImageRoll_Over(id_target, id_over, id_out)
{
	var target      = document.getElementById(id_target);
	var target_over = document.getElementById(id_over);
	var target_out  = document.getElementById(id_out);
	
	target.onmouseover = function()
	{
		target_over.style.display = 'none';
		target_out.style.display = '';
	}
	target.onmouseout = function()
	{
		target_over.style.display = '';
		target_out.style.display = 'none';
	}
}