function expand(s)
{
  var td = s;
  var d = td.getElementsByTagName("div").item(0);
  td.className = "menuHover";
  d.className = "menuHover";
}

function collapse(s)
{
  var td = s;
  var d = td.getElementsByTagName("div").item(0);
  td.className = "menuNormal";
  d.className = "menuNormal";
}
function onwork()
{
document.getElementById('first').style.background="url(images/linkL.gif) no-repeat";
document.getElementById('middle').style.background="url(images/linkM.gif) repeat-x"; 
document.getElementById('last').style.background="url(images/linkR.gif)  no-repeat";
}
function onworkout()
{
document.getElementById('first').style.background="";
document.getElementById('middle').style.background=""; 
document.getElementById('last').style.background="";
}