var openlist = ""
function toggle(targetId){
  if (document.getElementById){
  	var target = document.getElementById( targetId );
		if (target.style.display == "none"){
  			target.style.display = "";
			if (openlist!="")
				openlist.style.display = "none";
			openlist = target;

		} else if(target = openlist) {
			target.style.display = "";
		} else {
			target.style.display = "none";
		}
	}
}