//A function that handles multiple AJAX requests
function AjaxMultiple(ajaxArray, callback){
	//Set the callback
	this.callback = callback;

	//A function that handles the callback from the requests
	this.CallbackHandler = function(){
		this.amount -= 1;
		if (this.amount === 0) this.callback();
	}

	//A variable that is used to indicate how many requests are remaining to be completed
	this.remain = ajaxArray.length;

	for (var i = 0; i<this.remain; i++){
		//Current object
		var ajax = ajaxArray[i];

		//Note: _this is used as the property "this" changes within $.post and $.get
		var _this = this;

		//Specify file directory (optional)
		ajax['name'] = "php/"+ajax['name']+".php";

		if (ajax['parameters']){
			//Handle post request
			$.post(ajax['name'], ajax['parameters'], function(xhr){
				ajax['callback'](xhr);
				_this.CallbackHandlerl();
			});
		} else {
			//Handle get request
			$.get(ajax['name'], function(xhr){
				ajax['callback'](xhr);
				_this.CallbackHandler();
			});
		}
	}
}

//Example usage
//Ajax array containing 2 requests, one GET and one POST
var ajaxArray = [
	//A GET request that obtains the current server time
	{
		name:"serverTime",
		callback:function(xhr){
			console.log("The current server time is "+xhr);
		}
	},
	//A POST request that obtains the user email from the userId
	{
		name:"userEmail",
		params:{
			userId: 34
		},
		callback:function(xhr){
			console.log("Your email is "+xhr);
		}
	}
];

//Actual call to function
new AjaxMultiple(ajaxArray, function(){
	console.log("All tasks completed");
});

/*
Output:
==================================
The current server time is 12:05
Your email is xxxxxxx@gmail.com
All tasks completed
==================================
*/