//Gets the browser specific XmlHttpRequest Object
function getXmlHttpRequestObject()
{
	if (window.XMLHttpRequest)
	{
		return new XMLHttpRequest(); //Mozilla, Safari ...
	}
	else if (window.ActiveXObject)
	{
		return new ActiveXObject("Microsoft.XMLHTTP"); //IE
	}
	else
	{
		//Display our error message
		alert("Your browser doesn't support the XmlHttpRequest object.");
	}
}

var receiveReq = getXmlHttpRequestObject();

//Initiate the AJAX request
function makeRequest(url, param)
{
	//If our readystate is either not started or finished, initiate a new request
	if (receiveReq.readyState == 4 || receiveReq.readyState == 0)
	{
		//Set up the connection to captcha_test.html. True sets the request to asyncronous(default) 
		receiveReq.open("POST", url, true);

		//Set the function that will be called when the XmlHttpRequest objects state changes
		receiveReq.onreadystatechange = updatePage; 

		//Add HTTP headers to the request
		receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		receiveReq.setRequestHeader("Content-length", param.length);
		receiveReq.setRequestHeader("Connection", "close");

		//Make the request
		receiveReq.send(param);
	}
}

function formSubmit()
{
	document.getElementById("commentform").submit();
}

//Called every time our XmlHttpRequest objects state changes
function updatePage()
{
	//Check if our response is ready
	if (receiveReq.readyState == 4)
	{

		//Set the content of the DIV element with the response text
		var result_message = receiveReq.responseText;
		if(result_message != "success")
		{
			document.getElementById('result').innerHTML = result_message;
		}
		else
		{
			formSubmit();
		}
	}
}


//Called every time when form is perfomed
function getParam(theForm)
{
	//Set the URL
	var url = 'http://naturegnome.com/wp-content/themes/i3theme-1-3/captcha_compare.php';

	//Set up the parameters of our AJAX call
	var postStr = theForm.txtCaptcha.name + "=" + encodeURIComponent( theForm.txtCaptcha.value );

	//Call the function that initiate the AJAX request
	makeRequest(url, postStr);
}