- Prototype Tutorial
- Prototype - Home
- Prototype - Short Overview
- Prototype - Useful Features
- Prototype - Utility Methods
- Prototype - Element Object
- Prototype - Number Processing
- Prototype - Strings Processing
- Prototype - Array Processing
- Prototype - Hash processing
- Prototype - Basic Object
- Prototype - Templating
- Prototype - Enumerating
- Prototype - Event Handling
- Prototype - Form Management
- Prototype - JSON Support
- Prototype - AJAX Support
- Prototype - Expressing Ranges
- Prototype - Periodical Execution
- Prototype Useful Resources
- Prototype - Quick Guide
- Prototype - Useful Resources
- Prototype - Discussion
Prototype - Form.Element clear() Method
This method clears the contents of a text input.
Syntax
formElement.clear();
Return Value
It returns an HTML Element.
Example
This code sets up a text field in a way that it clears its contents the first time it receives focus.
<html> <head> <title>Prototype examples</title> <script type = "text/javascript" src = "/javascript/prototype.js"></script> <script> function showResult() { $('username').onfocus = function() { // if already cleared, do nothing if (this._cleared) return // otherwise clear this this.clear() this._cleared = true } } </script> </head> <body onload = "showResult();"> <p>Focus on username to see the result:</p> <br /> <form id = "example" action = "#" onsubmit = "return false"> <fieldset> <legend>User info</legend> <div> <label for = "username">Username:</label> <input name = "username" id = "username" value = "Sai" type = "text"> </div> <div> <label for = "age">Age:</label> <input name = "age" id = "age" value = "23" size = "3" type = "text"> </div> <div> <label for = "hobbies">Your hobbies :</label> <select name = "hobbies" id = "hobbies" multiple = "multiple"> <option>coding</option> <option>swimming</option> <option>hiking</option> <option>drawing</option> </select> </div> </fieldset> </form> </body> </html>
Output
prototype_form_management.htm
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