startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}
window.onload=startList; 
/* Zpracovano podle: Rigby, N. Drop-Down Menus, Horizontal Style. A LIST APART [online]. 29. 6. 2004 [cit. 27. 3. 2006].Dostupné na WWW: < http://www.alistapart.com/articles/horizdropdowns >. */