function _addLoadEvent(func){
 var oldonload = window.onload;
 if (typeof window.onload != 'function') 
           {
            window.onload = func;
           } else 
           {
            window.onload = function() 
           {
                if (oldonload) 
                {
                    oldonload();
                }
            func();
           }
  }
 }
 
function _addResizeEvent(func){
 var onresize = window.onresize;
 if (typeof window.onresize != 'function') 
           {
            window.onresize = func;
           } else 
           {
            window.onresize = function() 
           {
                if (onresize) 
                {
                    onresize();
                }
            func();
           }
  }
 }
 
 function _pw(){
 var s = document.getElementById('ctl00_Body');
 var lg = document.getElementById('leftGora');
 var rg = document.getElementById('rightGora');
 var l=document.getElementById('left');
 if (l.offsetWidth%2==0) {
      s.style.backgroundPosition  = '1px 0px';
      lg.style.backgroundPosition = '1px 0px';
      rg.style.backgroundPosition = '1px 0px';
    } else {
      s.style.backgroundPosition = '0px 0px';
      lg.style.backgroundPosition = '0px 0px';
      rg.style.backgroundPosition = '0px 0px';
    }
 }
 _addLoadEvent(_pw);
 _addResizeEvent(_pw);

 /* obsługa menu */
 var _pmenuzback = null;
 function pmenuz(obj) {
     if (_pmenuzback == null) {
         _pmenuzback = obj.parentNode.className;
         obj.parentNode.className = _pmenuzback + 'z';
     }
 }
 
 function pmenu(obj) {
     if (_pmenuzback != null) {
         obj.parentNode.className = _pmenuzback;
         _pmenuzback = null;
     }
 }