[php]
var formData = "name=ravi&age=31"; //Name value Pair
// or
//var formData = {name:"ravi",age:"31"}; //Array

$.ajax({
url : "AJAX_POST_URL",
type: "POST",
data : formData,
success:function(data, textStatus, jqXHR)
{
　　　　 var myArray = JSON.parse(data);
alert(myArray["Result"]=="OK");
},
error: function(jqXHR, textStatus, errorThrown)
{

}
});
[/php]