function logo_chg() {
 var sirka = document.body.clientWidth;
 if (sirka>1040) {document.body.style.backgroundPosition='98% 98%';}
 else {document.body.style.backgroundPosition='10px 98%';}
}

var oldhodnota1="#FF0000";
var oldhodnota2="#FF00FF";

function zvyrazni() {
  oldhodnota1=window.event.srcElement.style.color;
  oldhodnota2=window.event.srcElement.style.background;

  window.event.srcElement.style.color="#660000";
  window.event.srcElement.style.background="#CCCCCC";
  window.event.srcElement.style.cursor="pointer";
}
function odvyrazni() {
	window.event.srcElement.style.color=oldhodnota1;
	window.event.srcElement.style.background=oldhodnota2;
}

function menusel(id) {
	document.getElementById('top_'+id).style.backgroundColor='black';
	document.getElementById('child_'+id).style.display='block';
}

function menuunsel(id) {
	document.getElementById('top_'+id).style.backgroundColor='#990000';
	document.getElementById('child_'+id).style.display='none';
}

function menu_zvyrazni(id) {
	document.getElementById('menu_'+id).style.backgroundColor='#CCCCCC';
	document.getElementById('menu_'+id).style.color='#660000';
	document.getElementById('menu_'+id).style.cursor='pointer';
}

function menu_odvyrazni(id) {
	document.getElementById('menu_'+id).style.backgroundColor='#006446';
	document.getElementById('menu_'+id).style.color='white';
}