var openDiv = '';
function showHideDiv(divName) {
		if (openDiv.length == 0) {
			//alert('none open, opening: ' + divName);
			if (divName.length > 0) {
				document.all[divName].style.display = 'block';
				openDiv = divName;
			}
		} else if(divName == openDiv) {
			//alert('closing: ' + divName);
			document.all[openDiv].style.display = 'none';
			openDiv = '';
		} else {
			//alert('Another div is open, closing: ' + openDiv);
			document.all[openDiv].style.display = 'none';
			//alert('Now we can open up: ' + divName);
			document.all[divName].style.display = 'block';
			openDiv = divName;
		}
}