jQuery Mobile Tutorial 3.1.3 - http://ctoinsights.wordpress.com/2012/01/03/jquery-mobile-tutorial-part-iii-managing-data/

shareqr3.1.3.js

// Listen for any attempts to call changePage().
$(document).bind( "pagebeforechange", function(e, data) {
	// We only want to handle changePage() calls where the caller is asking us to load a page by URL.
	if (typeof data.toPage === "string") {
		// We only want to handle a subset of URLs.
		var u = $.mobile.path.parseUrl(data.toPage);
		var home = /^#home/;
		var qrcode = /^#qrcode/;
		if (u.hash.search(home) !== -1) {
			// Display a list of URLs.
			showUrlList(u, data.options);
			e.preventDefault();
		}
		else if (u.hash.search(qrcode) !== -1) {
			// Display QR code for the selected URL.
			showQRCode(u, data.options);
			e.preventDefault();
		}
	}
});