Update I'm just re-reading your question, and it looks like you intentionally combined values. As you use json_encode, it would be much better to send the values ββas an array and just access it in JavaScript.
echo json_encode(array($PostedDate, $Places, $Company, $Designation, $ProjectDetails, $DesiredCandidate, $HRName, $HRContact, $Email));
Then in JavaScript they will be available as follows:
alert(data[1]);