function grab() {
  var lis = document.getElementById('menu').getElementsByTagName('li');
     
  for (var i = 0; i < lis.length; i++)
  {  
    
    
    if (lis[i].className == 'current')
    {       
      lis[i].onmouseover = function ()
      {
        this.className = 'current hover';
      }
      lis[i].onmouseout = function ()
      { 
        this.className = 'current'; 
      }
    }
    
    else {
      lis[i].onmouseover = function ()
      {
         this.className = 'hover'; 
      }
      lis[i].onmouseout = function ()
      { 
        this.className = ''; }
      }
  }
}