function toggleMenu(objID) {
	if (!document.getElementById) return;
	var ob = document.getElementById(objID).style;
	ob.display = (ob.display == 'block')?'none': 'block';
	
	var head = document.getElementById("header_" + objID)

	if (ob.display == 'block')
	head.innerHTML = head.innerHTML.replace("[+]","[-]")
	else
	head.innerHTML = head.innerHTML.replace("[-]","[+]")

}