function disableLink(aLink) {
	aLink.href = "#";
	aLink.className = "disabled";

	obj = aLink;	
	while (obj) {
		obj = obj.parentNode;
		if (obj.tagName == "TABLE") {
			showHeader(obj);
			break;
		}
	}
}

function showHeader(taHeader) {
	aHeader = eval(taHeader.id.substr(1));
		
	taOnline.style.display = 'none';
	taAud.style.display = 'none';
	taMags.style.display = 'none';
	taTextRef.style.display = 'none';
	taOutsideUS.style.display = 'none';

	taLine.style.display = '';
	taHeader.style.display = '';

	aOnline.className = 'catA';
	aAud.className = 'catA';
	aMags.className = 'catA';
	aTextRef.className = 'catA';
	aOutsideUS.className = 'catA';
	
	aHeader.className = 'disabled';
}