var remember;
function Toggle(item) {		
    obj=document.getElementById(item);
    visible=(obj.style.display!="none");
    if(remember != null) {
		oobj=document.getElementById(remember);	
		oobj.style.display="none";    	
	}	
    if (visible) {
        obj.style.display="none";
        remember=null;
    } else {
        obj.style.display="block";
        remember = item;
    }
}