jQuery Mobile Tutorial 3.2.3 - http://ctoinsights.wordpress.com/2012/01/03/jquery-mobile-tutorial-part-iii-managing-data/

shareqr3.2.3.js

// When a new url is added, save it in the local storage and display the home page.
$("#addurl").live("submit" , function(e, data) {
	var url = $("#url").val();
	addUrl(url);
	$.mobile.changePage("#home");
	return false;
}); 

// Add a URL to the list.
function addUrl(url) {
	var myUrls = getMyUrls();
	// Check for duplicates
	if (findUrl(url) === -1) {
		myUrls = myUrls.concat(encodeURIComponent(url));
		localStorage.setItem("myUrls", JSON.stringify(myUrls));
	}
}

// Find URL in the url list.
// Return index or -1 if not found.
function findUrl(url) {
	var index = -1;
	var myUrls = getMyUrls();
	for (var i=0; i < myUrls.length; i++) {
		if (myUrls[i] === encodeURIComponent(url)) {
			return i;
		}
	}
	return index;
}