function layerSetup(id,visibility)
{
	this.obj = document.getElementById(id).style;
	this.obj.display = visibility;
	return this.obj;
}

function visVisible(param)
{
	new layerSetup(param,'block');

	/* Hide form elements */
  att_list = document.getElementById('attribute_list');
  if(typeof(att_list) == 'object')
  {
    //att_list.style.display='none';
    att_list.style.visibility='hidden';
  }
}

function visHidden(param)
{
	new layerSetup(param,'none');

	/* Show form elements */
  att_list = document.getElementById('attribute_list');
  if(typeof(att_list) == 'object')
  {
    //att_list.style.display='block';
    att_list.style.visibility='visible';
  }
}