$.ajax({ data: criteria, datatype: "application/json", type: "POST", url: "MI/DeleteItem/" + ItemID, cache: false, success: function (result) {... You've seen these ...
Bing has announced support for HTML5 pushState as a way to implement AJAX on a site in a way that enables Bing to crawl and index the URLs and content. As Google has supported this implementation ...
Google's John Mueller said in an #AskGoogleWebmasters video that now that "you no longer need to do anything special for hashbang URLs," if you still have those old URLs for the old AJAX crawling ...