erwan/background.html

## background.html
<script>
// Global variable accessed by the popup
var telList;

chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
    telList = request["phones"];
    chrome.pageAction.show(sender.tab.id);
    sendResponse({});
});

</script>

## contentScript.js
var phoneRe = /^\s*((\d{2}\s?){5})\s*$/;
var texts = document.evaluate(".//text()[normalize-space(.)!='']", document.body, null, 6, null);

var phones = [];
for (var i = 0; i < texts.snapshotLength; i++) {
    var textNode = texts.snapshotItem(i);
    var text = textNode.textContent;
    var m = phoneRe.exec(text);
    if (m != null) {
        var newText = document.createElement("a");
        newText.setAttribute("href", "callto:" + m[1]);
        newText.appendChild(document.createTextNode(m[0]));
        textNode.parentNode.replaceChild(newText, textNode);
        phones.push(m[1]);
    }
}

if (phones.length > 0) {
    chrome.extension.sendRequest({"phones": phones}, function(response) {});
}

## manifest.json
{
   "name": "Telify",
   "version": "0.2",
   "description": "Click to call",
   "background_page": "background.html",
   "content_scripts": [{
      "js": ["contentScript.js"],
      "matches": ["http://*/*"]
   }],
   "permissions": [
      "tabs",
      "http://ajax.googleapis.com/"
   ],
   "page_action": {
      "default_icon": "icons/tel.gif",
      "default_popup": "popup.html"
   }
}

## popup.html
<!DOCTYPE html>
<html>
    <style>
    body {
        width: 200px;
    }
    </style>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    <script>
            $(document).ready(function(){
            var telList = chrome.extension.getBackgroundPage().telList;
            if (telList && telList.length > 0) {
                for (i in telList)
                    $("ul").append("<li><a href='callto:" + telList[i] + "'>" + telList[i] + "</a></li>");
            }
        });

    </script>
    <body>
      <ul></ul>
    </body>
</html>
	<script>
	// Global variable accessed by the popup
	var telList;

	chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
	telList = request["phones"];
	chrome.pageAction.show(sender.tab.id);
	sendResponse({});
	});

	</script>
	var phoneRe = /^\s((\d{2}\s?){5})\s$/;
	var texts = document.evaluate(".//text()[normalize-space(.)!='']", document.body, null, 6, null);

	var phones = [];
	for (var i = 0; i < texts.snapshotLength; i++) {
	var textNode = texts.snapshotItem(i);
	var text = textNode.textContent;
	var m = phoneRe.exec(text);
	if (m != null) {
	var newText = document.createElement("a");
	newText.setAttribute("href", "callto:" + m[1]);
	newText.appendChild(document.createTextNode(m[0]));
	textNode.parentNode.replaceChild(newText, textNode);
	phones.push(m[1]);
	}
	}

	if (phones.length > 0) {
	chrome.extension.sendRequest({"phones": phones}, function(response) {});
	}
	{
	"name": "Telify",
	"version": "0.2",
	"description": "Click to call",
	"background_page": "background.html",
	"content_scripts": [{
	"js": ["contentScript.js"],
	"matches": ["http:///"]
	}],
	"permissions": [
	"tabs",
	"http://ajax.googleapis.com/"
	],
	"page_action": {
	"default_icon": "icons/tel.gif",
	"default_popup": "popup.html"
	}
	}