function _isElementInViewport(oDomElement) {
		var mRect;
		if (!oDomElement) {
			return false;
		}
		mRect = oDomElement.getBoundingClientRect();
		return (
			mRect.top >= 0 &&
			mRect.left >= 0 &&
			mRect.bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
			mRect.right <= (window.innerWidth || document.documentElement.clientWidth)
		);
	}
Determines if a DOM element is inside the viewport.