hideContents = function () {
	var cnt = toHide.length;
	for(var i = 0; i < cnt; i++){
		setDisplay(toHide[i], 'none');
	}
}

setDisplay = function (elem, value) {
	document.getElementById(elem).style.display = value;
}

displayContent = function (name){
	if (name == currentContent){
		return false;
	} else{
		setDisplay('content_' + currentContent, 'none');
		document.getElementById(currentContent + '_img').src = rootUrl + '/assets/siteimages/' + currentContent + '_off.gif';
		currentContent = name;
		setDisplay('content_' + name, 'block');
		document.getElementById(name + '_img').src = rootUrl + '/assets/siteimages/' + name + '_on.gif';
	}
}