function imgover(objId){
	if (!document.getElementById) return false;
	if (!document.getElementsByTagName) return false;
	var img = document.getElementById(objId);
	img.src = img.src.replace("_out","_on");
}
function imgout(objId){
	if (!document.getElementById) return false;
	if (!document.getElementsByTagName) return false;
	var img = document.getElementById(objId);
	img.src = img.src.replace("_on","_out");
}