/*function rollin () {
   //url = this.image.src.split('/\//').pop();
   this.src = this.src.replace(/\_dull/, '');
}

function rollout () {
   this.src = this.src.replace(/\.png/, '_dull.png');
}

function init() {
   if(!document.getElementById) return;
   images = document.getElementById('buttons').getElementsByTagName('img');
   for(var i = 0; i < images.length; i++) {
      images[i].onmouseover = rollin;
      images[i].onmouseout = rollout;
   }
}

window.onload = init;*/