<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<link href="../css/formcss.css" rel="stylesheet" type="text/css" media="screen" />
</head>
<body>
<form id="form3" action="#" method="post" onsubmit="return checkform(this);">
<label></label>
<p>
<label for="code">Write code below > <span id="txtCaptchaDiv" style="color:#F00"></span><!-- this is where the script will place the generated code -->
<input type="hidden" id="txtCaptcha" /></label><!-- this is where the script will place a copy of the code for validation: this is a hidden field -->
</p>
<p>
<input name="txtInput" type="text" id="txtInput" size="30" maxlength="7" />
</p>
<p><button type="submit">Send</button></p>
</form>
<script type="text/javascript">
function checkform(theform){
var why = "";
if(theform.txtInput.value == ""){
why += "- Security code should not be empty.\n";
}
if(theform.txtInput.value != ""){
if(ValidCaptcha(theform.txtInput.value) == false){
why += "- Security code did not match.\n";
}
}
if(why != ""){
alert(why);
return false;
}
}
//Generates the captcha function
var a = Math.ceil(Math.random() * 9)+ '';
var b = Math.ceil(Math.random() * 9)+ '';
var c = Math.ceil(Math.random() * 9)+ '';
var d = Math.ceil(Math.random() * 9)+ '';
var e = Math.ceil(Math.random() * 9)+ '';
var f = Math.ceil(Math.random() * 9)+ '';
var g = Math.ceil(Math.random() * 9)+ '';
var code = a + b + c + d + e+f+g;
document.getElementById("txtCaptcha").value = code;
document.getElementById("txtCaptchaDiv").innerHTML = code;
// Validate the Entered input aganist the generated security code function
function ValidCaptcha(){
var str1 = removeSpaces(document.getElementById('txtCaptcha').value);
var str2 = removeSpaces(document.getElementById('txtInput').value);
if (str1 == str2){
return true;
}else{
return false;
}
}
// Remove the spaces from the entered and generated code
function removeSpaces(string){
return string.split(' ').join('');
}
</script>
</body>
</html>
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