How can I add "on click" event from external js file

Hi everyone
I’m new in chronoforms, I’m working with CFV5 and Joomla 3.3. I need to add a click event to a button, I found a “how to” and I have added a load javascript action with the code below:

jQuery(document).ready(function($)
{
function addCmdTestClick()
{
$(document).on('click', 'input[name="cmdTest"]', function(){ 
 alert('click');
});
}
addCmdTestClick();
});

It works perfectly, but now, I need to save this code in external js file and load it with

<?php
JFactory::getDocument()->addScript(JURI::base().'code/MyJS.js');
?>

My external file looks like this

function cmdTest1Click()
{
	alert("CLICK from file")
}

function addCmdTest1Click()
{
	alert("File Loaded OK");
/* just one of these */
	$(document).on('click', 'input[name="cmdTest1"]', function(){alert("click");});
	$(document).on('click', 'input[name="cmdTest1"]', cmdTest1Click);
	$(document).on('click', 'input[name="cmdTest1"]', cmdTest1Click());
}

addCmdTest1Click();

I have made a lot of tests but nothing works, I know that the file is loaded correctly, but the click event is not triggered.

Is possible to do that from js file?
If it is possible, what changes I have to make in my external file?

Thanks in advance
Hugo G