function startList(){
  eles = document.getElementsByTagName('li');
  var i;
  for(i=0; i<eles.length; i++){
    eles[i].onmouseover = function() {
      this.className = 'over';
    }
    eles[i].onmouseout = function() {
      this.className = this.className.replace('over', '');
    }
  }
}