Here is something which might help you: JavaScript Xml Document and XPath

Issues with namespace

You will have issues with the namespaced XML, especially on Opera and Chrome browsers. There are also the differences from IE. In this case the you will have to make use of a library like sarisa for example. Or, could try to implement your own light xml library based on the existing implementation of the DOM on each browser. The last option it can perform faster since is based on the native browser support. I...