Geek Answer

#Validate the Pan Card field <!--Code snippets for validating PAN number.--> 1) In HTML 5 <input type="text" name="pan" id="pan" pattern="^([a-zA-Z]){5}([0-9]){4}([a-zA-Z]){1}?$"> 2) In JavaScript <input type="text" name="pan" id="pan" onkeyup="return ValidatePan(this.value)"> <script> function ValidatePan(pan){ var regpan = /^([a-zA-Z]){5}([0-9]){4}([a-zA-Z]){1}?$/; if(regpan.test(pan) == false) { alert("Permanent Account Number is not yet valid."); return false; } else { alert("You have entered a valid Permanent Account Number !"); return true; } } </script>