var swappedImgSrc = "/imgs/residency/pyramid_down.jpg";

function swapPyramid() {
	var featureContainer = document.getElementById('Feature');
	if(featureContainer) {
		var pyramidImg = featureContainer.getElementsByTagName('img')[0];
		var pyramidImgSrc = pyramidImg.src;
		pyramidImg.onmouseover = function() {
			pyramidImg.src = swappedImgSrc;
		}
		pyramidImg.onmouseout = function() {
			pyramidImg.src = pyramidImgSrc;
		}
	}
}
addLoadEvent(swapPyramid);