/*function disappear(obj,arrow) {
  if (obj.style.display == "none") {
    obj.style.display = "";
	arrow.src="graphics/arrow_d.gif";

  }
  else {
    obj.style.display = "none";
	arrow.src="graphics/arrow_r.gif";
  }
} */


function disappear(obj,arrow) {
	if (document.layers) // NS 4.x
	{
		d1=document.layers[obj];
		if (d1.visibility=="hide")
		{
		d1.visibility="show";
		document.layers[arrow].src="graphics/arrow_d.gif";
		}
		else
		{
		d1.visibility="hide";
		document.layers[arrow].src="graphics/arrow_r.gif";
		}
	}
	else{
		if (document.getElementById) // DOM-compliant browsers 
		{
			d1=document.getElementById(obj);
			a1 = document.getElementById(arrow);
			
		}
		else if (document.all) // IE 4.x
		{
			d1=document.all[obj];
			a1=document.all[arrow];
		}
		else
		{
			return
		}
		
		if (d1.style.display=="none")
		{
			d1.style.display="block";
			a1.src="graphics/arrow_d.gif";
				
		}
		else
		{
			d1.style.display="none";
			a1.src="graphics/arrow_r.gif";
		}
	}
}