window.onload = function()
{
	if(document.getElementById)
	{
		var linkContainer = document.getElementById('showOptional');
		if ( linkContainer ) {
			var toggle = linkContainer.appendChild(document.createElement('a'));
			toggle.href = '#';
			toggle.appendChild(document.createTextNode('Remove optional fields?'));
			toggle.onclick = function()
			{
				var linkText = this.firstChild.nodeValue;
				this.firstChild.nodeValue = (linkText == 'Remove optional fields?') ? 'Display optional fields?' : 'Remove optional fields?';
				
				var tmp = document.getElementsByTagName('fieldset');
				for (var i=0;i<tmp.length;i++)
				{
					if(tmp[i].className == 'frm-optional')
					{
						tmp[i].style.display = (tmp[i].style.display == 'none') ? 'block' : 'none';
					}
				}
				return false;
			}
		}
	}
}