// holds an instance of XMLHttpRequest
var xmlHttp = createXmlHttpRequestObject();
// creates an XMLHttpRequest instance
function createXmlHttpRequestObject()
{
// will store the reference to the XMLHttpRequest object
var xmlHttp;
// this should work for all browsers except IE6 and older
try
{
// try to create XMLHttpRequest object
xmlHttp = new XMLHttpRequest();
}
catch(e)
{
// assume IE6 or older
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHttp");
}
catch(e) { }
}
// return the created object or display an error message
if (!xmlHttp)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
	// called to read a file from the server
	function processdesign()
	{
		
	if(document.frmtype.type.value != 0)
	{
		// only continue if xmlHttp isn't void
		if (xmlHttp)
		{
		// try to connect to the server
		try
		{
	
		var typeid = document.frmtype.type.value;
		
		xmlHttp.open("GET", "calculator2.php?typeid="+typeid, true);
		xmlHttp.onreadystatechange = handleRequestStateChangedesign;
		xmlHttp.send(null);
		}
		// display the error in case of failure
		catch (e)
		{
		alert("Can't connect to server:\n" + e.toString());
		}
		}
	}
	else
	{
		processbinding();
	}
	
	}
	// function that handles the HTTP response
	function handleRequestStateChangedesign()
	{
	// obtain a reference to the <div> element on the page
	var myDiv = document.getElementById("cal_design")
	// display the status of the request
	if (xmlHttp.readyState == 1)
	{
		document.getElementById("div_loading").style.display = "block";
	}
	/*
	else if (xmlHttp.readyState == 2)
	{
	myDiv.innerHTML += "Request status: 2 (loaded) <br/>";
	}
	else if (xmlHttp.readyState == 3)
	{
	myDiv.innerHTML += "Request status: 3 (interactive) <br/>";
	}
	// when readyState is 4, we also read the server response
	else */
	else if (xmlHttp.readyState == 4)
	{
		// continue only if HTTP status is "OK"
		document.getElementById("div_loading").style.display = "none";
		if (xmlHttp.status == 200)
		{
				
			try
			{
			// read the message from the server
			response = xmlHttp.responseText;
			// display the message
			//myDiv.innerHTML += "Request status: 4 (complete). Server said: <br/>";
			myDiv.innerHTML = response;
			
						
			check(1);
			
			}
			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.statusText);
		}
	}
}