var captcha_reload_count = 0;

var captcha_image_url = "captcha.php";

codemsg = '';

  function new_captcha_image() {

    if (captcha_image_url.indexOf('?') == -1) {

		  document.getElementById('captcha_image').src= captcha_image_url+'?c='+captcha_reload_count;

		} else {

		  document.getElementById('captcha_image').src= captcha_image_url+'&c='+captcha_reload_count;

		}



    document.getElementById('captcha_input').value="";

    document.getElementById('captcha_input').focus();

    captcha_reload_count++;

  }

function ajaxInitial()

{

	try {

	  request = new XMLHttpRequest();

	} catch (trymicrosoft) {

	  try {

		request = new ActiveXObject("Msxml2.XMLHTTP");

	  } catch (othermicrosoft) {

		try {

		  request = new ActiveXObject("Microsoft.XMLHTTP");

		} catch (failed) {

		  request = false;

		}

	  }

	}

	

	if (!request)

		alert("Error initializing XMLHttpRequest!");

	return request;

}

function captcha_validate_ajax()

{

	request = ajaxInitial();

	var url = "captcha_validate.php?captcha=" + document.form.captcha.value;

	request.open("GET", url, false);

	request.onreadystatechange = function(){

		if(request.readyState == 4 && request.status == 200) {

			if(request.responseText != '')

			{

				codemsg = request.responseText;

				//alert(request.responseText);

				return false;

			}else{

				return true;

			}

		}else{

			return false;

		}

	};

	request.send(null);

}

function checkForm()

{

	msg = "";

	codemsg = '';

	if (document.form.captcha.value == "") 

	{

		msg += "You need to type in text validation code\n";

	}else{

		captcha_validate_ajax();

	}

	msg += codemsg;

	if (msg != "")

	{

		alert(msg);

		return false;

	}

	else

	{

		return true;

	}

}