function flipDivVisibility(turnOffDiv, turnOnDiv) {
    hideDiv(turnOffDiv);
	displayDiv(turnOnDiv);
}

function hideDiv(divName) {
    if (document.getElementById(divName)) {
        document.getElementById(divName).style.display = 'none';
    }
}

function hideDivDelayed(divName, delayTime) {
    window.setTimeout("hideDiv(\'"+divName+"\')", delayTime);
}

function displayDiv(divName) {
    if (document.getElementById(divName)) {
        document.getElementById(divName).style.display = 'block';
    }
}

function displayDivDelayed(divName, delayTime) {
    window.setTimeout("displayDiv(\'"+divName+"\')", delayTime);
}