<!--
function showMenu (n,on) {
	objSetStyle('menuitem'+n,'background',(on) ? '#336699':'#99ccff');
	objSetStyle('menuitem'+n,'color',(on) ? 'white':'black');
	objDisplay('submenu'+n,on);
	}

var actMenu = 1;
function openMenu (n) {
	if (n==actMenu) {
		objDisplay('sm'+n,false);
		actMenu = 0;
		}
	else {
		if (actMenu) objDisplay('sm'+actMenu,false);
		objDisplay('sm'+n,true);
		actMenu = n;
		}
	}
function openText(name) {
	var on = objGet(name).style.display=='block';
	objDisplay(name,!on);
	}

//-->
	
function objGet(x) {
	if (typeof x != 'string') return x;
	else if (Boolean(document.getElementById)) return document.getElementById(x);
	else if (Boolean(document.all)) return eval('document.all.'+x);
	else return null;
}

function objSetStyle (obj,prop,val) {
	var o = objGet(obj);
	if (o && o.style) {
		eval ('o.style.'+prop+'="'+val+'"');
		return true;
		}
	else return false;
	}

function objShow (obj,on) {
	return objSetStyle(obj,'visibility',(on) ? 'visible':'hidden');
	}

function objDisplay (obj,on,type) {
	if (on && !type) type = 'block';
	return objSetStyle(obj,'display',(on) ? type:'none');
	}

// Ceske ekvivalenty funkci:

var objNajdi = objGet;
var objNastavStyl = objSetStyle;
var objZobraz = objShow;