function changeLink(obj,status){
	document.getElementById("td_left_" + obj.id).className = "td_left_" + status;
	document.getElementById("td_center_" + obj.id).className = "td_center_" + status;
	document.getElementById("td_right_" + obj.id).className = "td_right_" + status;
}

function changeNavLink(obj,status){
	document.getElementById("img_nav_left_" + obj.id).src = "images/nav_left_" + status + ".jpg";
	document.getElementById("td_center_" + obj.id).className = "td_nav_center_" + status;
	document.getElementById("img_nav_right_" + obj.id).src = "images/nav_right_" + status + ".jpg";
}