How to validate using Regular expression?
i wanted to validate the meter reading.
Valid value: 1234.0 123.5 51234.9
Invalid value: 1234 123 1235.99 1234.80
Hi chetan,
Check this example. Now please take its reference and correct your code.
HTML
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script> <script type="text/javascript"> $(function () { $('#txtMeterReading').keyup(function () { if ($(this).val().length > 0) { var regex = /((\d+)(\.\d{1}))$/; if (regex.test($(this).val())) { $('#msg').html("Valid"); } else { $('#msg').html("Invalid"); } } else { $('#msg').html(""); } }); }); </script> </head> <body> <input type="text" id="txtMeterReading" /> <span id="msg" style="color: Red;"></span> </body> </html>
Demo
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