Gmail – How to make the chat search box in Gmail show mobile number or other details when viewing contacts profile

There are a couple different ways to remove the chat feature from Gmail.

1. As previously mentioned, simply click the "Turn off Chat" link in the footer of your Gmail inbox. Depending on the version of Gmail that you are using (as determined by Google), this may or may not hide the chat window completely.

2. You can also click the "older version" link in the footer, which will 100% of the time remove the chat window from the left hand side (in my experience). You can also simply add the querystring parameter &ov=1 to the URL of your inbox (https://mail.google.com/mail/?ui=1&ov=1), this will have the same effect.

3. If your goal is to simply remove the chat from the left hand side, but not altogether, you can click on the "labs" icon (a little beaker) at the top of your inbox, and enable the Gmail lab entitled "Right-side chat", which will move your chat to the right hand side of the inbox.

4. If none of those options are satisfactory, then I would suggest enabling IMAP and using Microsoft Outlook, or Mozilla Thunderbird for managing your Gmail. See here: http://mail.google.com/support/bin/answer.py?answer=77695

You can use this Greasemonkey script from lifehacker

Copying it here for the record:

// ==UserScript==
// @name            Show Editable Subject
// @description  Always show editable subject field when replying to a message in Gmail.
// @include         http://mail.google.com/*
// @include         https://mail.google.com/*
// @author          Gina Trapani
// @namespace   http://lifehacker.com
// @version         0.1

// @tab Compose
// @homepage http://lifehacker.com/
// ==/UserScript==


// Version 0.1: Released

// Borrowed some keyhandler code from http://bitterpill.org/gmail_tinyurl/
// Repurposed some code from http://userscripts.org/scripts/review/20887
// Based on  mathmike's the Show Details  user script http://userscripts.org/scripts/show/13700
// mathmike: Most of the functions below were borrowed from Gmail Macros (New)


var CLICK_TO_SHOW = "MRoIub";
var INNER_HTML = "Edit Subject"
var KEYCOMBO_ONLY=false;
var THIRD_KEYCODE=66; 

var gmail = null;

window.addEventListener('load', function() {
  if (unsafeWindow.gmonkey) {
    unsafeWindow.gmonkey.load('1.0', function(g) {
      gmail = g;

    if (KEYCOMBO_ONLY) {
        getDoc().defaultView.addEventListener('keydown', keyHandler, false);
    } else {
        gmail.registerViewChangeCallback(handleView);
        handleView();
    }
    });
  }
}, true);

function getDoc() {
 return gmail.getNavPaneElement().ownerDocument;
}

function keyHandler(event) {
    GM_log(event.ctrlKey + ' ' + event.shiftKey + ' ' + event.keyCode);
    if (event.ctrlKey == true && event.shiftKey == true && event.keyCode == THIRD_KEYCODE) { 
         clickSpan();
    }
}

function handleView() {
     //if (gmail.getActiveViewType() == "co") clickSpan();  //Compose view
      if (gmail.getActiveViewType()=="cv") tryToClickSpan();  //Conversation view, user may hit Reply link
}

function clickSpan() {
  var nodes = 
    getNodesByTagNameAndClass(gmail.getActiveViewElement(), "span", CLICK_TO_SHOW);
  if (!nodes) return false;
  for (var i in nodes) {
      GM_log("Node " + i + " HTML is " + nodes[i].innerHTML );
      if (nodes[i].innerHTML == INNER_HTML){
        simulateClick(nodes[i], "click");
        return true;
      }
    }
}

function simulateClick(node, eventType) {
  var event = node.ownerDocument.createEvent("MouseEvents");
  event.initMouseEvent(eventType,
                       true, // can bubble
                       true, // cancellable
                       node.ownerDocument.defaultView,
                       1, // clicks
                       50, 50, // screen coordinates
                       50, 50, // client coordinates
                       false, false, false, false, // control/alt/shift/meta
                       0, // button,
                       node);

  node.dispatchEvent(event);
}

function getNodesByTagNameAndClass(rootNode, tagName, className) {
  var expression = 
      ".//" + tagName + 
      "[contains(concat(' ', @class, ' '), ' " + className + " ')]";

  return evalXPath(expression, rootNode);
}

function evalXPath(expression, rootNode) {
  try {
    var xpathIterator = rootNode.ownerDocument.evaluate(
      expression,
      rootNode,
      null, // no namespace resolver
      XPathResult.ORDERED_NODE_ITERATOR_TYPE,
      null); // no existing results
  } catch (err) {
    GM_log("Error when evaluating XPath expression '" + expression + "'" +
           ": " + err);
    return null;
  }
  var results = [];

  // Convert result to JS array
  for (var xpathNode = xpathIterator.iterateNext();
       xpathNode;
       xpathNode = xpathIterator.iterateNext()) {
    results.push(xpathNode);
  }

  return results;
}

function tryToClickSpan()  {
        if (!clickSpan() ) {
            setTimeout(tryToClickSpan, 500);
        }
}