[jQuery] How to tell apart focus event

[bob]

Hi,
<form>
       Name: <input type="text" id="my_name" name="my_name">
</form>

Is it possible to tell apart focus event?

jQuery("#my_name").focus(function (evt) {


        if( ??? ){

                //execute this if focus was triggered by user clicking on the 
text
field
        }
        else {
                //execute this if focus was triggered by method call like this
                //document.getElementById("my_name").focus();

        }


});