Need to find and then replace Attribute values

[admin]

Hi,I've been racking my brain trying to figure out how to search for a specificattribute, and if it meets a certain condition, change it's value.For example, the following element <item> has several attributes:<item id="111" name="test" qty="2" price="99.99">My condition is as follows:-If the id attribute = 111 then change the qty attribute to 3.Can this be done, if so, how?Thanks in advance,Chris