function changeDisplay (aLink) {
//alert("changeDisplay invoked. idName="+aLink);
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	
	if (aLink=="contactTab"){
		document.getElementById('tab1').style.display = '';
		document.getElementById('tab2').style.display = 'none';
		document.getElementById('contactTab').className = document.getElementById('contactTab').className+" active";
		document.getElementById('directionsTab').className = 'tab';
	} else {
		document.getElementById('tab1').style.display = 'none';
		document.getElementById('tab2').style.display = '';
		document.getElementById('contactTab').className = 'tab';
		document.getElementById('directionsTab').className = document.getElementById('directionsTab').className+" active";
	}
}
addLoadEvent( function () { changeDisplay('contactTab'); });