function toggle(id){
ul = "ul_" + id;
img = "img_" + id;
ulElement = document.getElementById(ul);
imgElement = document.getElementById(img);
if (ulElement){
      if (ulElement.className == 'closed'){
		ulElement.className = "open";
        imgElement.src = "images/opened.gif";
         }else{
        ulElement.className = "closed";
        imgElement.src = "images/closed.gif";
      }
   }
}

window.onerror = function(){ return true; }