function onpageload() 
{
  init_spantags()
}

function init_spantags() 
{
  if (document.getElementsByTagName) 
  {
    var tags = document.getElementsByTagName("span")
    var i
    for (i = 0; i < tags.length; i++) {
      if (tags[i].className && tags[i].className == "li-nav") {
        eval( "tags[i].onmouseover = function () { this.className='li-navover' }" ) 
        eval( "tags[i].onmouseout  = function () { this.className='li-nav' }" ) 
      }
    }
  }
}