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

  d.className = "menuHover";
}

function collapse(s)
{
  var td = s;
  var d = td.getElementsByTagName("div").item(0);

  d.className = "menuNormal";
}

function high_d(s)
{
	var td = s;
	td.src = "/images/d_ok_h.GIF";
}

function high_u(s)
{
	var td = s;
	td.src = "/images/u_ok_h.GIF";
}

function low_d(s)
{
	var td = s;
	td.src = "/images/d_ok.GIF";
}

function low_u(s)
{
	var td = s;
	td.src = "/images/u_ok.GIF";
}

function hidev()
{
	document.getElementById('hideb').className  = "div_nonvis";
	document.getElementById('showb').className  = "div_vis";
	document.getElementById('intro').className  = "div_nonvis";
}

function showv()
{
	document.getElementById('hideb').className  = "div_vis";
	document.getElementById('showb').className  = "div_nonvis";
	document.getElementById('intro').className  = "div_vis";
}