I'm assuming you have preloaded the titles into a JavaScript array of the form: ['Title1', 'Title2'] etc. My example below makes use of JQuery to simplify the use of Ajax.
var titles = ['Inception', 'Batman Begins', 'Terminator Salvation'];
for (var i=0;i<titles.length;i++) {
$.getJSON('http://www.imdbapi.com/?t=' + titles[i], function(data) {
// HANDLE THE DATA HERE
});
}
There is one small catch, however. The code is not going to work on most browsers because you are trying to access a site whose domain is different from yours. That is called cross-domain scripting and most browsers do not allow it. This is typically handled by means of a proxy i.e. you get your server to connect to the URL using an Http client and then you access it from your server. JSONP is another approach you might use. This post can be helpful:
Firefox setting to enable cross domain ajax request