var flyingSpeed = 25;
var url = 'http://www.thegioiquaviet.com/index.php?option=cart';
var shopping_cart_div = false;
var flyingDiv = false;
var currentProductDiv = false;

var shopping_cart_x = false;
var shopping_cart_y = false;

var slide_xFactor = false;
var slide_yFactor = false;

var diffX = false;
var diffY = false;

var currentXPos = false;
var currentYPos = false;

var ajaxObjects = new Array();

function commify(Num)
{ 
	var newNum = "";
    var newNum2 = "";
    var count = 0;
	//this loop actually adds the commas   
    for (var k = Num.length-1; k >= 0; k--)
	{
      var oneChar = Num.charAt(k);
      if (count == 3)
	  {
        newNum += ",";
        newNum += oneChar;
        count = 1;
        continue;
      } 
	  else 
	  {
        newNum += oneChar;
        count ++;
      }
   }
   
  // but now the string is reversed! = re-reverse the string
  for (var k = newNum.length-1; k >= 0; k--)
  {
      var oneChar = newNum.charAt(k);
      newNum2 += oneChar;
  }
  return newNum2;
}

function shoppingCart_getTopPos(inputObj)
{		
  var returnValue = inputObj.offsetTop;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetTop;
  }
  return returnValue;
}

function shoppingCart_getLeftPos(inputObj)
{
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetLeft;
  }
  return returnValue;
}
	

function addToBasket(productId,quantity)
{
if(!shopping_cart_div) 
	
	shopping_cart_div = document.getElementById('shopping_cart');
	
	if(!flyingDiv)
	{
		flyingDiv = document.createElement('DIV');
		flyingDiv.style.position = 'absolute';
		document.body.appendChild(flyingDiv);
	}
	
	shopping_cart_x = shoppingCart_getLeftPos(shopping_cart_div);
	shopping_cart_y = shoppingCart_getTopPos(shopping_cart_div);

	currentProductDiv = document.getElementById('slidingProduct' + productId);
	
	currentXPos = shoppingCart_getLeftPos(currentProductDiv);
	currentYPos = shoppingCart_getTopPos(currentProductDiv);
	
	diffX = shopping_cart_x - currentXPos;
	diffY = shopping_cart_y - currentYPos;
	

	
	var shoppingContentCopy = currentProductDiv.cloneNode(true);
	shoppingContentCopy.id='';
	flyingDiv.innerHTML = '';
	flyingDiv.style.left = currentXPos + 'px';
	flyingDiv.style.top = currentYPos + 'px';
	flyingDiv.appendChild(shoppingContentCopy);
	flyingDiv.style.display='block';
	flyingDiv.style.width = currentProductDiv.offsetWidth + 'px';
	flyToBasket(productId,quantity);	
	
}


function flyToBasket(productId,quantity)
{
        var maxDiff = Math.max(Math.abs(diffX),Math.abs(diffY));
	var moveX = (diffX / maxDiff) * flyingSpeed;;
	var moveY = (diffY / maxDiff) * flyingSpeed;	
	
	currentXPos = currentXPos + moveX;
	currentYPos = currentYPos + moveY;
	
	flyingDiv.style.left = Math.round(currentXPos) + 'px';
	flyingDiv.style.top = Math.round(currentYPos) + 'px';	
	
	
	if(moveX>0 && currentXPos > shopping_cart_x){
		flyingDiv.style.display='none';		
	}
	if(moveX<0 && currentXPos < shopping_cart_x){
		flyingDiv.style.display='none';		
	}
		
	if(flyingDiv.style.display=='block'){
		setTimeout('flyToBasket(' + productId + ',' + quantity + ')',10);
	}else{
		ajaxAddProduct(productId,quantity);
	}
    	
}



function ajaxAddProduct(productId,quantity)
{
	var ajaxIndex = ajaxObjects.length;
	
	
	ajaxObjects[ajaxIndex] = new sack();
	
	ajaxObjects[ajaxIndex].requestFile = url + '&productId=' + productId + '&quantity=' + quantity;	// Saving product in this file
	
	ajaxObjects[ajaxIndex].onCompletion = 
	function(){ showAjaxBasketContent(ajaxIndex); };	// Specify function that will be executed after file has been found
	
	ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function		
}