var	imgpath = "/terrains/images/";
var	imgon   = imgpath+"menu_over.gif";
var	imgoff  = imgpath+"menu_out.gif";

var     ns  = (document.layers) ? true : false;                // ns4x
var     dom = (document.getElementById) ? true : false;        // DOM compatible browser (ie6+, ns6+, mozilla...)
var     ie  = (document.all) ? true : false;                   // ie4x

function	imgOn(n, i)
{
  if (i)
    document.images[n+i].src = imgpath+n+"_on.gif";
  else
    document.images[n].src = imgpath+n+"_on.gif";
}

function	imgOff(n, i)
{
  if (i)
    document.images[n+i].src = imgpath+n+"_off.gif";
  else
    document.images[n].src = imgpath+n+"_off.gif";  
}

function	menuCss(id, cls, sid)
{
  if (dom)
    {
      if (sid != null)
        {
          var nm = sid+'m-'+id;
          var nl = sid+'l-'+id;
        }
      else
        {
          var nm = 'm-'+id;
          var nl = 'l-'+id;
        }
      var m = document.getElementById(nm);
      if (m)
        m.className = cls;
      var l = document.getElementById(nl);
      if (l)
        l.className = cls;
    }
}

function	doLink(id)
{
  if (ie)
    {
      if (document.all[id])
	document.location = document.all[id];
    }
  else if (dom || ns)
    {
    
      if (document.links[id])
	document.location = document.links[id];
    }
}