Textbox max length validation using javascript
In this example i have explained how to do textbox max length validation using javascript. here i used to validate regular expression. this textbox will allow max 10 characters only. Using JQuery also we can do text box count validation.<html> <head> <title></title> <script type="text/javascript"> function validate() { var txtMaxLength = document.getElementById("txtMaxLength").value; //Max length validation with regular expression var retxtMaxLength = /^[\s\S]{0,10}$/; if (!txtMaxLength.match(retxtMaxLength)) { alert('Max length only 10 characters.'); return false; } } </script> </head> <body> <input type="text" id="txtMaxLength" /><br /> <input type="button" value="Max Length Validation" onclick=" return validate();" /> </body> </html>Before doing this we may require text box required field validation.
For more form validation you can go see Form Validation.
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