Regular implementation text box can only enter 16 numbers, each 4 digits after adding a space

"x-ua-compatible"Content="Ie=emulateie7"/> <title></title> <!--http://Www.cnblogs.com/babycool --<script src=".. /js/jquery-1.7.2.min.js"Type="Text/javascript"></script> <script type="Text/javascript">$ (function () {$ ("#xxxxxx"). KeyUp (function () {//If you enter a non-number, replace with ' ', and if you enter a number, add a space after every 4 bits                 This. Value = This. Value.replace (/[^\d]/g,"'). Replace (/(\d{4}) (? =\d)/g," $");    })        }); </script>limit input of 19 characters only<input id="xxxxxx"Type="text"Name="name"Value=""Maxlength=" +"/> <br/> <br/>Enter a non-numeric replace with"'<input type="text"Name="name"Value=""onkeyup="Value=value.replace (/[^\d]/g, ")"/> <br/> <br/></body>

Regular implementation text box can only enter 16 numbers, each 4 digits after adding a space