// show or hide the element identified 
// by the id string in divName 
function toggleDiv(divName) {
	thisDiv = document.getElementById(divName);
	if (thisDiv) {
		if (thisDiv.style.display == "block") {
			thisDiv.style.display = "none";
		} else {
			thisDiv.style.display = "block";
		}
	}
}

// hide the element identified 
// by the id string in divName 
function hideDiv(divName) {
	thisDiv = document.getElementById(divName);
	if (thisDiv) {
		thisDiv.style.display = "none";
	}
}

// show the element identified 
// by the id string in divName 
function showDiv(divName) {
	thisDiv = document.getElementById(divName);
	if (thisDiv) {
		thisDiv.style.display = "block";
	}
}