d = document;
opera = (navigator.userAgent.indexOf('Opera') >= 0)? true : false;
ie = (document.all && !opera)? true : false;
dom = (document.getElementById && !ie && !opera)? true : false;

if (dom || ie) 
{
	d.writeln('<STYLE type="text/css">');
	d.writeln('.menu_display { display: none; }');
	d.writeln('</STYLE>');
}

function dis(obj_id)
{	
	obj_id = 'id' + obj_id;
	if (ie) {
	  if (!document.all[obj_id]) {return false};  
		document.all[obj_id].style.display = (document.all[obj_id].style.display == "block") ? "none" : "block";
	} else if (dom) {
    if (!document.getElementById(obj_id)) {return false};  	  
	  document.getElementById(obj_id).style.display = (document.getElementById(obj_id).style.display == "block") ? "none" : "block";
	}
	// return false;
}

function disid(obj_id)
{	
	if (ie) {
	  if (!document.all[obj_id]) {return false};
	  document.all[obj_id].style.display = (document.all[obj_id].style.display == "block") ? "none" : "block"}
	else if (dom) {
	  if (!document.getElementById(obj_id)) {return false};
	  document.getElementById(obj_id).style.display = (document.getElementById(obj_id).style.display == "block") ? "none" : "block";}
	// return false;
}


function view() { }