how to delete o &0 in javascript captcha code

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hi i have captcha code bout i need to delete o &0 in javascript captcha code and don't sensitive uppercase and lowercase
please guide me?
thanks

Posted 1-Sep-15 1:44am

Member 11686005

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Member 11686005 1-Sep-15 7:45am

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Captcha</title>
<script type="text/javascript">
/* Function to Generat Captcha */
function GenerateCaptcha() {
//var chr1 = Math.ceil(Math.random() *10) + '';
//var chr2 = Math.ceil(Math.random() * 10) + '';
//var chr3 = Math.ceil(Math.random() * 10) + '';

var str = new Array(4).join().replace(/(.|$)/g, function () { return ((Math.random() * 36) | 0).toString(36)[Math.random() < .5 ? "toString" : "toLowerCase" ](); });
var captchaCode = str + chr1 + ' ' + chr2 + ' ' + chr3;
document.getElementById("txtCaptcha").value = captchaCode
}

/* Validating Captcha Function */
function ValidCaptcha() {
var str1 = removeSpaces(document.getElementById('txtCaptcha').value);
var str2 = removeSpaces(document.getElementById('txtCompare').value);

if (str1 == str2) return true;
return false;
}

/* Remove spaces from Captcha Code */
function removeSpaces(string) {
return string.split(' ').join('');
}
</script>
</head>
<body >
<div style="border: 2px solid gray; width: 700px;">

Generating Captcha Demo

Enter the Captcha Text:
<input type="text" id="txtCompare" />
<input type="text" id="txtCaptcha" style="text-align: center; border: 2px dashed red; background-image:url(captcha/1.jpg) font-weight: bold; font-size: 20px; font-family: Modern" />
<input type="button" id="btnrefresh" value="Refresh" />
<input id="btnValid" type="button" value="Check" />

<br />
<br />
</div>
</body>
</html>

Sergey Alexandrovich Kryukov 1-Sep-15 9:20am

Please, all code, properly formatted, in the body of the question, using "Improve question".
—SA

Member 11686005 1-Sep-15 14:42pm

I send all code to read and help me.?

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