jQuery validator decimal number
Only through examples. Text edit, so it teaches.
<html lang="en"> <head> <meta charset="utf-8"> <title>Makes "field" required and a decimal number only.</title> <link href="http://jqueryvalidation.org/files/demo/site-demos.css" rel="stylesheet"> </head> <body> <form id="myform"> <label for="field">Required, decimal number: </label> <input class="left" id="field" name="field"> <br/> <input type="submit" value="Validate!"> </form> <script src="http://code.jquery.com/jquery-1.11.1.min.js"></script> <script src="http://cdn.jsdelivr.net/jquery.validation/1.15.0/jquery.validate.min.js"></script> <script src="http://cdn.jsdelivr.net/jquery.validation/1.15.0/additional-methods.min.js"></script> <script> // just for the demos, avoids form submit jQuery.validator.setDefaults({ debug: true, success: "valid" }); $( "#myform" ).validate({ rules: { field: { required: true, number: true } } }); </script> </body> </html>