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var code; function createCaptcha() { //clear the contents of captcha div first document.getElementById('captcha').innerHTML = ""; var charsArray = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@!#$%^&*"; var lengthOtp = 6; var captcha = []; for (var i = 0; i < lengthOtp; i++) { //below code will not allow Repetition of Characters var index = Math.floor(Math.random() * charsArray.length + 1); //get the next character from the array if (captcha.indexOf(charsArray[index]) == -1) captcha.push(charsArray[index]); else i--; } var canv = document.createElement("canvas"); canv.id = "captcha"; canv.width = 100; canv.height = 50; var ctx = canv.getContext("2d"); ctx.font = "25px Georgia"; ctx.strokeText(captcha.join(""), 0, 30); //storing captcha so that can validate you can save it somewhere else according to your specific requirements code = captcha.join(""); document.getElementById("captcha").appendChild(canv); // adds the canvas to the body element } function validateCaptcha() { event.preventDefault(); debugger if (document.getElementById("cpatchaTextBox").value == code) { alert("Valid Captcha") }else{ alert("Invalid Captcha. try Again"); createCaptcha(); } }

Dr. DeArmond – dentist in Cleveland TN

Dr. DeArmond - dentist in Cleveland TN