Captcha Code: A CAPTCHA (an acronym for "Completely
Automated Public Turing test to tell Computers and Humans Apart") is a
type of challenge-response test used in computing to determine whether
or not the user is human.
Captcha.html:
<html>
<head>
<script type="text/javascript" >
function DrawCaptcha()
{
var a = Math.ceil(Math.random() * 10)+ '';
var b = Math.ceil(Math.random() * 10)+ '';
var c = Math.ceil(Math.random() * 10)+ '';
var d = Math.ceil(Math.random() * 10)+ '';
var e = Math.ceil(Math.random() * 10)+ '';
var f = Math.ceil(Math.random() * 10)+ '';
var g = Math.ceil(Math.random() * 10)+ '';
var code = a + ' ' + b + ' ' + ' ' + c + ' ' + d + ' ' + e + ' '+ f + ' ' + g;
document.getElementById("Captcha").value = code
}
function ValidCaptcha()
{
var str1 = removeSpaces(document.getElementById('Captcha').value);
var str2 = removeSpaces(document.getElementById('InputCaptcha').value);
if (str1 == str2)
{
alert("Correct");
}
else
{
alert("Wrong Entry");
}
}
// Remove the spaces from the entered and generated code
function removeSpaces(string)
{
return string.split(' ').join('');
}
</script>
</head>
<body onload="DrawCaptcha()">
<form>
Captcha Code:<input type="text" id="Captcha"/>
<input type="button" value="Refresh" onclick="DrawCaptcha()"/>
<br/>Enter code: <input type="text" id="InputCaptcha" />
<br/>
<input type="button" value="Check" onclick="ValidCaptcha()"/>
</form>
</body>
</html>
Output:
Captcha.html:
<html>
<head>
<script type="text/javascript" >
function DrawCaptcha()
{
var a = Math.ceil(Math.random() * 10)+ '';
var b = Math.ceil(Math.random() * 10)+ '';
var c = Math.ceil(Math.random() * 10)+ '';
var d = Math.ceil(Math.random() * 10)+ '';
var e = Math.ceil(Math.random() * 10)+ '';
var f = Math.ceil(Math.random() * 10)+ '';
var g = Math.ceil(Math.random() * 10)+ '';
var code = a + ' ' + b + ' ' + ' ' + c + ' ' + d + ' ' + e + ' '+ f + ' ' + g;
document.getElementById("Captcha").value = code
}
function ValidCaptcha()
{
var str1 = removeSpaces(document.getElementById('Captcha').value);
var str2 = removeSpaces(document.getElementById('InputCaptcha').value);
if (str1 == str2)
{
alert("Correct");
}
else
{
alert("Wrong Entry");
}
}
// Remove the spaces from the entered and generated code
function removeSpaces(string)
{
return string.split(' ').join('');
}
</script>
</head>
<body onload="DrawCaptcha()">
<form>
Captcha Code:<input type="text" id="Captcha"/>
<input type="button" value="Refresh" onclick="DrawCaptcha()"/>
<br/>Enter code: <input type="text" id="InputCaptcha" />
<br/>
<input type="button" value="Check" onclick="ValidCaptcha()"/>
</form>
</body>
</html>
Output:
