var selected

function changeMenu(obj){
	resetMenu();
	obj.src = "/html/img/" + obj.id + ".on.gif"
	document.getElementById("subMenu").className = obj.id + "sub"
	document.getElementById(obj.id + "content").className = "sub_selected"
}

function selectMenu(obj){
	selected = obj.id
	resetMenu();
	document.getElementById(selected + "content").className = "sub_selected"
	
}

function resetMenu(){
	document.getElementById("m1").src = "/html/img/m1.off.gif"
	document.getElementById("m2").src = "/html/img/m2.off.gif"
	document.getElementById("m3").src = "/html/img/m3.off.gif"
	document.getElementById("m4").src = "/html/img/m4.off.gif"
	
	
	document.getElementById("m1content").className = "sub_unselected"
	document.getElementById("m2content").className = "sub_unselected"
	document.getElementById("m3content").className = "sub_unselected"
	document.getElementById("m4content").className = "sub_unselected"
	
	
	if(typeof selected !== "undefined"){
		document.getElementById(selected).src = "/html/img/" + selected + ".on.gif"
	}
}