function showItemMenu(e){
  var lis = document.getElementById('item-menu').getElementsByTagName('li');
  var links = document.getElementById('item-menu').getElementsByTagName('a');
  for(var i=0;i<lis.length;i++){
    lis[i].style.backgroundColor = '#f1f1f1';
    lis[i].style.borderColor = 'white';
    //links[i].style.color = 'black';
    links[i].style.fontWeight = '';
  }
  //e.style.color = '#ff9900';
  e.style.fontWeight = 'bolder';
  e.parentNode.style.borderColor = '#f1f1f1';
  e.parentNode.style.borderBottom = '2px white solid';
  e.parentNode.style.backgroundColor = 'white';
}