jquery ajax load

// Used like this:

$(selector).load(URL,data,callback); 

//e.g. use case:

<div id="example">
	<!-- Load data here -->
</div>

<script>
	$("#example").load("sum.php", { "num1": 1, "num2": 2 }, function () {
	DoSomething();
}); 
</script>

// sum.php

echo $_POST['num1'] +  $_POST['num2'];
// Output: 3

$("button").click(function(){
  $("#div1").load("demo_test.txt", function(responseTxt, statusTxt, xhr){
    if(statusTxt == "success")
      alert("External content loaded successfully!");
    if(statusTxt == "error")
      alert("Error: " + xhr.status + ": " + xhr.statusText);
  });
});