function showTab(id)
// Function that will swap the display/no display for
// all content within div tags
{
	
	if (document.getElementById) { // DOM3 = IE, Netscape 6
		document.getElementById('newsbox_news').style.display = 'none';
		document.getElementById('newsbox_button_news').src = 'templates/fieldbus/images/newsbox_news.gif';
		document.getElementById('newsbox_events').style.display = 'none';
		document.getElementById('newsbox_button_events').src = 'templates/fieldbus/images/newsbox_events.gif';
		document.getElementById('newsbox_training').style.display = 'none';
		document.getElementById('newsbox_button_training').src = 'templates/fieldbus/images/newsbox_training.gif';
		
		if (document.getElementById('newsbox_' + id).style.display == "none"){
			document.getElementById('newsbox_' + id).style.display = 'block';
			document.getElementById('newsbox_button_' + id).src = 'templates/fieldbus/images/newsbox_' + id + '_lit.gif';
		} else {
			document.getElementById('newsbox_' + id).style.display = 'none';		
		}
	} else { // Firefox
		if (document.layers) {	
			document.newsbox_news.style.display = 'none';
			document.newsbox_button_news.src = 'templates/fieldbus/images/newsbox_news.gif';
			document.newsbox_events.style.display = 'none';
			document.newsbox_button_events.src = 'templates/fieldbus/images/newsbox_events.gif';
			document.newsbox_training.style.display = 'none';
			document.newsbox_button_training.src = 'templates/fieldbus/images/newsbox_training.gif';
			
			if (document.newsbox_[id].display == "none"){
				document.newsbox_[id].display = 'block';
				document.newsbox_button_[id].src = 'templates/fieldbus/images/newsbox_' + id + '_lit.gif';
			} else {
				document.newsbox_[id].display = 'none';
			}
		} else {
			if (document.all.newsbox_[id].style.visibility == "none"){
				document.all.newsbox_[id].style.display = 'block';
				document.all.newsbox_button_[id].src = 'templates/fieldbus/images/newsbox_' + id + '_lit.gif';
			} else {
				document.all.newsbox_[id].style.display = 'none';
			}
		}
	}

}