var receiveReq = getXhr();

function makeRequest(url, param) {
	if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
		receiveReq.open("POST", url, true);
		receiveReq.onreadystatechange = updatePage;
		receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		receiveReq.setRequestHeader("Content-length", param.length);
		receiveReq.setRequestHeader("Connection", "close");
		receiveReq.send(param);
	}
}

function updatePage() {
	if (receiveReq.readyState == 4) {
		document.getElementById('result').innerHTML = receiveReq.responseText;
		img = document.getElementById('imgCaptcha');
		img.src = 'includes/captcha_img.php?' + Math.random();
	}
}

function getParam(theForm,sess) {
	var url = 'includes/captcha.php';
	var postStr = theForm.sitecheck.name + "=" + encodeURIComponent( theForm.sitecheck.value );
	if(sess==theForm.sitecheck.value){
		document.getElementById("chkcc").style.display="none";
		document.getElementById("sitecheck").disabled=true;
	}
	makeRequest(url, postStr);
}