/**
 * Get the contents returned from a web URL.
 * @param {string} urlStr The web address of the page you wish to fetch.
 * @returns {string} The contents of the web page.
 */
function fetch(urlStr) {
	if (typeof java == "undefined") {
		throw "This script requires java to run.";
	}
	else {
		importPackage(java.io, java.net);

		var url = new URL(urlStr);
		var urlStream = url.openStream();
		var reader = new BufferedReader(new InputStreamReader(urlStream, "latin1"));

		var html = "";
		var line;
		while (line = reader.readLine()) {
			if (line == null) break;
			html += line;
		}
		return html;
	}
}

Fetch the contents of webpage via Rhino

JavaScript