// holds an instance of XMLHttpRequest
var xmlHttp_showcart = createXmlHttpRequestObject();
// creates an XMLHttpRequest instance
function createXmlHttpRequestObject()
{
// will store the reference to the XMLHttpRequest object
var xmlHttp_showcart;
// this should work for all browsers except IE6 and older
try
{
// try to create xmlHttp_showcartRequest object
xmlHttp_showcart = new XMLHttpRequest();
}
catch(e)
{
// assume IE6 or older
try
{
xmlHttp_showcart = new ActiveXObject("Microsoft.XMLHttp");
}
catch(e) { }
}
// return the created object or display an error message
if (!xmlHttp_showcart)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp_showcart;
}
	// called to read a file from the server
	
	 
	
	function showcart()
	{
 		 
		 var url = "showcart.php";
		 
		if (xmlHttp_showcart)
		{
		// try to connect to the server
			try
			{
			
			xmlHttp_showcart.open("POST", url, true);
			xmlHttp_showcart.onreadystatechange = handleRequestStateChange_showcart;
			xmlHttp_showcart.send(null);
			}
			// display the error in case of failure
			catch (e)
			{
			alert("Can't connect to server:\n" + e.toString());
			}
		}
		
	 
	
	}
	
	
	
	
	
	
	// function that handles the HTTP response
	function handleRequestStateChange_showcart()
	{
	// obtain a reference to the <div> element on the page
	
	// display the status of the request
	if (xmlHttp_showcart.readyState == 1)
	{
		
		
		//document.getElementById("default_tab").style.display="block";

	}/*
	else if (xmlHttp_showcart.readyState == 2)
	{
	myDiv.innerHTML += "Request status: 2 (loaded) <br/>";
	}
	else if (xmlHttp_showcart.readyState == 3)
	{
	myDiv.innerHTML += "Request status: 3 (interactive) <br/>";
	}
	// when readyState is 4, we also read the server response
	*/
	else if (xmlHttp_showcart.readyState == 4)
	{
		// continue only if HTTP status is "OK"
 
		if (xmlHttp_showcart.status == 200)
		{
				
			try
			{
			
				response = xmlHttp_showcart.responseText;
				 
		 		document.getElementById("cart").innerHTML = response;
			 
			
			}
			catch(e)
			{
			// display error message
				alert("Error reading the response: " + e.toString());
			}
		}
		else
		{
			// display status message
		alert("There was a problem retrieving the data:\n" +
		xmlHttp_showcart.statusText);
		}
		
	}
}