Java, Ajax to php

I know there is a disconnect between my Java and PHP, not being a programmer, I am sure I am missing something. 

the user.js looks like this:

function ExecuteScript(strId)
{
  switch (strId)
  {
      case "5xNs6o4ljs0":
        Script1();
        break;
  }
}

function Script1()
{
  // get Storyline player
var p = GetPlayer();

// get course title
var title = p.GetVar("varCourseTitle");

// get course result
var resultstatus = p.GetVar("varResultsStatus");

//display value on screen - U S E   T O   D E B U G 
alert("Course title: " + title);
alert("Result-Status to be passed: " + resultstatus);


$.post( "myPHP.php", { myQuizTitle:varCourseTitle, myPass:varResultsStatus}  );

alert("You are here");
}

In Function Script(1) is triggered on the results slide, I know the code works thought the first two alerts so I know the variables are exporting just fine.

Out in the folder where I published I put the myPHP.php file, very simple.

<?php

    $quiztitle = $POST['myQuizTitle'];
    $pass = $POST['myPass'];

    $file = fopen("test.txt","w");
    echo fwrite($file,"Hello World. Testing!");
    ($file);
?>

I know that this works, as I dummied it up and called it from a web page.  So the question I think is how do I create a call to jquery in side my user.js to call an ajax post event to make use of my PHP. 

Cheers

harry