JSON and the Dynamic Script Tag: Easy, XML-less Web Services for JavaScript

Making requests to third-party web services from an AJAX application is a pain, but new web services that offer the option of returning JSON (JavaScript Object Notation) instead of XML can provide significant relief. In fact, if you make web services requests using the dynamic script tag approach -- and the web service lets you specify a JavaScript callback function -- you can have unfettered access to the web service in a seamless, cross-domain, cross-browser fashion.

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