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

function xiazai()
{
 window.open('/xzzhq/xzai/index.asp', 'popupnav', 'width=450,height=500,resizable=0,scrollbars=auto');
}