extjs equivalent to Flex URLLoader class?

[Mic1]

Flex URLLoader allows html text of supplied url to be loaded into a Flex variable for parsing etc. tia, Mic.

[gpsietzema]

I use an ajax call, which executes a PHP file where I load and parse all the HTML. I then use json_encode() and echo the result, which gets passed back to Ext-JS and loads it in a variable.