/**
 * Expands/Displays a specified layer by its ID
 */
function expandLayerByID( elementID )
{
	expandLayer( document.getElementById(elementID) );
}


/**
 * Expands/Displays a specified layer
 */
function expandLayer( element )
{
	if( element != undefined )
	{
		element.style.display = "inline";
	}
}

/**
 * Collapses/Hides a specified layer by its ID
 */
function collapseLayerByID( elementID )
{
	collapseLayer( document.getElementById(elementID) );
}


/**
 * Collapses/Hides a specified layer
 */
function collapseLayer( element )
{
	if( element != undefined )
	{
		element.style.display = "none";
	}
}