var rolled_image = new Image();
rolled_image.src = '/images/download_180_orange.png';

function add_image_swappers() {
	var download_image = document.getElementById('download_image');
	download_image.onmouseover = function() {
		download_image.src = '/images/download_180_orange.png';
	}
	
	download_image.onmouseout = function() {
		download_image.src = '/images/download_180.png';
	}
}

if(window.addEventListener) {
	window.addEventListener('load', add_image_swappers, false);
} else if(window.attachEvent) {
	window.attachEvent('onload', add_image_swappers);
}