Chrome extension: messaging

Hey!

This is not a real extension, I'm just screwing around to see how this works.

Basically, in my background.html page I have this:

function test3()
{
alert("blah3");
chrome.extension.sendRequest('test2');
}

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and in my popup.html page, I have this:

chrome.extension.onRequest.addListener(
    function(request, sender, sendResponse) {
        if(request.function == "test3") {
           alert("Works!");
           }
    }
);

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But the alert "Works" never seems to be called... I even tried to replace the

 alert("Works!");

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with

call_test_function();

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which in turn has an alert()... but that does not get called either.

Mind telling me where I went wrong? And giving me the code to make my little example work?

I even reversed the pages so that the code from background is in popup and the code from popup is in background... does not work :(

Thanks! R