DevGuru JavaScript OBJECT: Form



			OBJECT: Form Forms allow us to prompt a user for input using elements such as radio buttons, checkboxes and selection lists. Data gathered in this manner can then be posted to a server for processing. A form is created by enclosing HTML controls and other elements within <form></form> tags. A page can contain as many forms as required, but they cannot be overlapping or nested (the closing </form> tag of a form must precede the opening tag of any subsequent form). PROPERTIES action Property This property specifies the URL address to which the data gathered by the form will be submitted. An email address can also be specified using the 'mailto:anybody@anywhere.com' syntax. Syntax: object.action = URL elements Property This property is an array containing an object for each element on the form. These objects (checkboxes, radio buttons, etc.) are added to the array in the order that they appear in the document's source code. Syntax: object.elements encoding Property This property sets the MIME type that is used to encode the data gathered by the elements in a form for submission when using the post method. This property initially contains a string reflecting the enctype attribute of the form tag, but using encoding will override this. Syntax: object.encoding length Property This property returns the number of elements in a form. Syntax: object.length method Property This property is a string specifying how information input in a form is submitted to the server. This should return either 'get', which is the default, or 'post'. Syntax: object.method name Property This property sets or returns the name of the form. Initially contains the name attribute of the <form> tag. Syntax: object.name target Property This property sets or returns the target window that responses are sent to after submission of a form. Syntax: object.target METHODS handleEvent Method This method invokes the event handler for the specified event. Syntax: object.handleEvent"event" reset Method This method resets the default values of any elements in a form. Emulates the clicking of a Reset button (athough it is not necessary to have a reset button in a form to use this method). Syntax: object.reset( ) submit Method This method submits a Form. This is the same as clicking a Submit button. Syntax: object.submit( ) EVENT HANDLERS onReset Event handler The onReset event handler is used to execute specified JavaScript code whenever the user resets a form by cicking a Reset button. Syntax: object.onReset="myJavaScriptCode" onSubmit Event handler The onSubmit event handler is used to execute specified JavaScript code whenever the user submits a form, and as such, is included within the HTML <form> tag Syntax: object.onSubmit="myJavaScriptCode"