var N   = (document.layers) ? true:false;                 // netscape 4
var IE   = (document.all) ? true:false;                    // ie4+
var DOM = ((document.getElementById)&&(!IE))?true:false;   // ns6 etc.
window.onresize=windowOnload;

function windowOnload()
{
 
}

function Schovejmenu(m) {

	nameMenu = "podmenu" + m;
	if (IE) {document.all[nameMenu].style.visibility = "hidden";}
	if (N) {document[nameMenu].visibility = "hidden";}
	if (DOM) {document.getElementById(nameMenu).style.visibility = "hidden";}
}

function Zobrazmenu(a) {    
	nameMenu = "podmenu" + a;
 
	if (IE) {document.all[nameMenu].style.visibility = "visible";}
	if (N) {document[nameMenu].visibility = "visible";}
	if (DOM) {document.getElementById(nameMenu).style.visibility = "visible";}
}