function correctContentHeight()
{
	$('content').style.height = '';
	var viewportHeight = document.documentElement.clientHeight;
	var headerHeight = $('header').offsetHeight;
	var contentHeight = $('content').offsetHeight;
	var mainColumnHeight = $('mainColumn').offsetHeight;
	if((mainColumnHeight - headerHeight) <= viewportHeight)
	{
		$('content').style.height = (viewportHeight - headerHeight) + 'px';
	} else {
		$('content').style.height = (mainColumnHeight - headerHeight) + 'px'
	}
}

function selectItem(id)
{
		$('menuOverlay'+id).style.backgroundImage = 'url(images/menuclear.png)';
		$('menuText'+id).style.backgroundImage = 'url(images/menutext.png)';
		$('menuText'+id).style.color = 'white';
}

function deselectItem(id)
{
		$('menuOverlay'+id).style.backgroundImage = 'url(images/menuoverlay.png)';
		$('menuText'+id).style.backgroundImage = 'url(images/menutext2.png)';
		$('menuText'+id).style.color = 'black';
}