function getElementbyClass(classname)
{
  var inc=0;
  var elt=new Array();
  var alltags=document.all? document.all : document.getElementsByTagName("*");
  for (i=0; i<alltags.length; i++)
    {
      if (alltags[i].className==classname)
	elt.unshift(alltags[i]);
    }
  return elt;
}	

function getobj(id)
{
  if(document.layers)
    return document.id; // Netscape 4.x
  if(document.getElementById)
    return document.getElementById(id); // Netscape 6.x IE 5.x
  if(document.all)	
    return id; // IE 4.x
}
function toogleDisplay(idName)
{
  if(!idName)
    return true;

  var obj=getobj(idName);

  if(!obj.style.display)
    obj.style.display="none";
  if(obj.style.display=="block")
    obj.style.display="none";
  else
    obj.style.display="block";
  return true;
}