/* exit URL wrapper */

window.onload = function() {
	wrapExitLinks();
}

function wrapExitLinks() {
	var whiteList = "^gov^mil^";
	var exitURL = document.location.protocol + "//" + document.location.host + "/exit.html";      // Default exit is /exit.html from referring site
	var currentBaseURL = document.location.protocol + "//" + document.location.hostname + document.location.pathname;
	var links = document.getElementsByTagName("a");

	var linkDest;
	var linkTLD;
	var govTLD;
	
	/* Do not wrap links on intersitial exit page */
	if  (currentBaseURL != exitURL) {
		for (var i in links) {
			if (links[i].host) {
				linkTLD = links[i].hostname.substr(links[i].hostname.lastIndexOf(".") + 1);     // Extract top level domain from target link
				linkDest = links[i].href;
				if (whiteList.indexOf("^" + linkTLD + "^") == -1) {
					linkDest = exitURL + "?url=" + encodeURIComponent(linkDest);
					links[i].href = linkDest;
				}
			}	
		}
	} else {
		confirmExit();	
	}	
}

function confirmExit() {
	var queryString = decodeURIComponent(document.location.search.substr(1));
	var linkDest = queryString.substr(queryString.indexOf("url=")  + 4);
	var exitLink = document.getElementById("exitLink");	

	/* Assume http:// if no protocol provided */
	if (linkDest.indexOf("://")  == -1) {
		linkDest = "http://" + linkDest;
	}
	exitLink.href = linkDest;
	exitLink.innerHTML = linkDest;
}