function subnav(div)	{

 closeall();
	
  if (document.getElementById)
  {
  
	document.getElementById(div).className = 'visible';
	
  }
 
  else if (document.all)
  {

//	document.[div].style.visibility = 'visible';
  }
  else if (document.layers)
  {

 //  	this.obj = document.layers[div];
 //  	this.style = document.layers[div];
  }

}

function closeall()	{

	//	close all

	
	for(i=1;i<4;i++)	{
	
		var submenu = "submenu" + i;
		
		document.getElementById(submenu).className = 'hidden';
		
	}

}