/*function refreshCaptcha()
{  
	//Get a reference to CAPTCHA image
   img = document.getElementById('imgCaptcha'); 
   //Change the image
   img.src = 'create_image.php?' + Math.random();
	
}*/

var xmlHttp;
function refreshCaptcha()
{  
	//Get a reference to CAPTCHA image
   img = document.getElementById('imgCaptcha'); 
   //Change the image
   img.src = 'create_image.php?' + Math.random();
   
   getCaptchaCode();	
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	  {
	  // Firefox, Opera 8.0+, Safari
	  xmlHttp=new XMLHttpRequest();
	  }
	catch (e)
	  {
	  // Internet Explorer
	  try
		{
		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		
		}
	  catch (e)
		{
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	  }
	return xmlHttp;
}


function getCaptchaCode()
{
	xmlHttp=GetXmlHttpObject();
	
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
	 	return;
	}
	
	var url="getCaptchaCode.php";
//	url=url+"?id="+id;
	var params = "";
	xmlHttp.onreadystatechange=setCaptchaCode;
	
	xmlHttp.open("POST",url,true);
	
	xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlHttp.setRequestHeader("Content-length", params.length);
	xmlHttp.setRequestHeader("Connection", "close");	
	
	xmlHttp.send(params);
}

function setCaptchaCode()
{
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{
		document.getElementById("captchacode").value = xmlHttp.responseText;
	}
}