RegEx to parse complex xml javascript

This retrieves the matches and performs replacements:

var testString = '<gd:phoneNumber rel=http://schemas.google.com/g/2005#mobile>206 555 1212</gd:phoneNumber>';

var regex = /.*#(\w+)">(.*)</i;

// matches[1] will be "mobile" and matches[2] will be "206 555 1212"
var matches = regex.exec(testString);

// Replace #mobile with #home
testString = testString.replace(matches[1], 'home');

// Replace the phone number with 555 555 5555
testString = testString.replace(matches[2], '555 555 5555');

Those simple replacements will work as long as there's no overlap between those values and the rest of the XML element's contents (e.g. if the schemas.google.com URL contained the string mobile somewhere before #mobile, this wouldn't work). Long as that's the case, this is the easier way to do the replacements.

This is what I have so far and it works but is there a better way?

"<gd:phoneNumber rel=http://schemas.google.com/g/2005#mobile>206 555 1212</gd:phoneNumber>".replace(/#.*</g, '#home>111-111-1111<')

Returns:

"<gd:phoneNumber rel=http://schemas.google.com/g/2005#home>111-111-1111</gd:phoneNumber>"

So I can inject the new values

"<gd:phoneNumber rel=http://schemas.google.com/g/2005#mobile>206 555 1212</gd:phoneNumber>".match(/#.*</g)[0].replace(/[#<]/g, "").split(/>/)

returns: ["mobile", "206 555 1212"]

allowing me to get the values

take a look at http://www.webreference.com/js/column5/methods.html