var menuLeft = {

_tabSpan : new Array(),
_tabA : new Array(),


init:function(){

var menu = document.getElementById('menuLeft');
var li = menu.getElementsByTagName('li');

var x = 0;

for(var i=0;i<li.length;i++){
var aLi = li[i].getElementsByTagName('a');
  menuLeft._tabA[i] = aLi[0];
}

for(var i=0;i<menuLeft._tabA.length;i++){
  menuLeft.addEvent(menuLeft._tabA[i],'mouseover',menuLeft.inIcon);
  menuLeft.addEvent(menuLeft._tabA[i],'mouseout',menuLeft.outIcon);
}



},
addEvent : function(elem,eventS,funkcja){
if(window.addEventListener) elem.addEventListener(eventS,funkcja,false);
else elem.attachEvent('on'+eventS,funkcja,false);  
},
inIcon : function(e){
var event = (e)?e:event; 
var element;
if(event.srcElement) element = event.srcElement;
else element = this;

var tabNA = element.childNodes;
var span;


for(var y=0;y<tabNA.length;y++){
       if(tabNA[y].tagName == 'SPAN'){   
        span = tabNA[y];
       }
}

var posBack = span.style.backgroundPosition;
var tab = posBack.split(' ');

tab[0] = '0px';

span.style.backgroundPosition = tab.join(' ');

},

outIcon : function(e){
var event = (e)?e:event; 
var element;
if(event.srcElement) element = event.srcElement;
else element = this;

var tabNA = element.childNodes;
var span;


for(var y=0;y<tabNA.length;y++){
       if(tabNA[y].tagName == 'SPAN'){   
        span = tabNA[y];
       }
}

var posBack = span.style.backgroundPosition;
var tab = posBack.split(' ');

tab[0] = '-18px';

span.style.backgroundPosition = tab.join(' ');
}




};