I have simplecaptcha 1.2.1 jar file in my libraries in eclipse IDE and its working fine. there was no option to refresh the captcha so i hav added the following code but its not working.
function refreshCaptcha()
{
var xmlhttp;
if (window.XMLHttpRequest)
{
xmlhttp=new XMLHttpRequest();
}
else
{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
{
alert(xmlhttp.responseText);
document.getElementById("captcha").innerHTML=xmlhttp.responseText;
}
}
}
xmlhttp.open("GET","captchaImg",true);
xmlhttp.send();
}
and my html part is
<img src="captchaImg" id="captcha"/>
<img src="resources/images/refresh.jpeg" onclick="refreshCaptcha()"/>
the respone in the alert i m getting is some what like this --�PNGIHDR�2�3�j
"captchaImg" is added as URL-Pattern in my servlet-mapping in web-xml. can anyone help me how to refresh the captcha.
no need of any ajax call i just added this code
onclick="document.getElementById('captcha').src='captchaImg?'+
(new Date().getTime());"
this thing is most important one: ?'+(new Date().getTime());