function doNode(node) {
	node.style.cursor = "pointer";
	var left = node.src.substring(0, node.src.indexOf(".png"));
	var right = node.src.substring(node.src.indexOf(".png"), node.src.length);
	
	var img = new Image();
	img.src = node.src;
	var rimg = new Image();
	rimg.src = left + "-over" + right;
	
	node.onmouseover = function() { node.src = rimg.src; }
	node.onmouseout = function() { node.src = img.src; }
}

init = function() {
	var nodes = new Array();
	var elems = document.getElementsByTagName('*');
	var pattern = new RegExp("(^|\\s)rollover(\\s|$)");
	for (var i = 0, j = 0; i < elems.length; i++) {
		if (pattern.test(elems[i].className)) {
			nodes[j] = elems[i];
			j++;
		}
	}

	for (var x = 0; x < nodes.length; x++) {
		doNode(nodes[x]);
	}
}

//leaving the senate servers so we have to display this message:
function openWin(urlToOpen) {
	window.open("http://www.senate.gov/cgi-bin/exitmsg?url=" + urlToOpen);	
}

//leaving the current site, but staying on senate servers.
function openSenateWin(urlToOpen) {
	window.open(urlToOpen);	
}