barcode using vb.net Using the Properties and Methods of the Form Object in Java

Drawing Quick Response Code in Java Using the Properties and Methods of the Form Object

Using the Properties and Methods of the Form Object
QR-Code Printer In Java
Using Barcode printer for Java Control to generate, create QR Code image in Java applications.
Decoding QR Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
The JavaScript form object will help you when you need to access certain elements or attributes of the form in a script The form object has only a few properties and methods The properties are described first
Paint Barcode In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
Read Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
Properties
QR Code ISO/IEC18004 Printer In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
QR Code 2d Barcode Printer In VS .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
The form object s properties provide information you might need when working with forms in your scripts Table 14-1 lists the properties of the form object and their values Most of these properties just hold values corresponding to the various attributes in an HTML form tag A few of them have different types of values, though, as explained next
Quick Response Code Maker In Visual Studio .NET
Using Barcode encoder for VS .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.
QR Code JIS X 0510 Creator In VB.NET
Using Barcode encoder for VS .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
The action Property
Print GS1 DataBar-14 In Java
Using Barcode maker for Java Control to generate, create DataBar image in Java applications.
Generate UPC-A Supplement 2 In Java
Using Barcode generator for Java Control to generate, create UPC A image in Java applications.
This property allows you to access the value of the action= url attribute in the opening form tag This attribute is used to send the form to a server-side script for processing (such
Print European Article Number 13 In Java
Using Barcode maker for Java Control to generate, create GTIN - 13 image in Java applications.
1D Barcode Printer In Java
Using Barcode maker for Java Control to generate, create Linear image in Java applications.
Property
Drawing MSI Plessey In Java
Using Barcode printer for Java Control to generate, create MSI Plessey image in Java applications.
Encode ECC200 In C#.NET
Using Barcode drawer for .NET Control to generate, create Data Matrix image in Visual Studio .NET applications.
action elements encoding length method name target
Barcode Recognizer In .NET Framework
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications.
Code-39 Maker In Objective-C
Using Barcode encoder for iPhone Control to generate, create Code 39 Extended image in iPhone applications.
Value
UPC Symbol Maker In Java
Using Barcode drawer for Android Control to generate, create UPC Code image in Android applications.
Painting UPC-A Supplement 2 In Visual Studio .NET
Using Barcode generator for .NET Control to generate, create Universal Product Code version A image in .NET applications.
The value of the action attribute in the HTML form tag An array that includes an array element for each form element in an HTML form The value of the enctype attribute, which varies with different browsers The value of the total number of elements in an HTML form The value of the method attribute in an HTML form tag The value of the name attribute in an HTML form tag The value of the target attribute in an HTML form tag
Data Matrix Maker In VS .NET
Using Barcode maker for ASP.NET Control to generate, create DataMatrix image in ASP.NET applications.
Paint Code 3 Of 9 In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create Code 3 of 9 image in ASP.NET applications.
Table 14-1 Properties of the Form Object
14: JavaScript and Forms
as a Perl or PHP script) The following example shows how to access the property with a named form:
An action attribute is defined
<body> <form name="info_form" action="http://someplacecom/php/formphp"> Name: <input type="text" /><br /> <input type="submit" /> The value of the action property </form> is written on the page <p> <script type="text/javascript"> documentwrite("The form goes to "+documentinfo_formaction); </script> </p> </body>
This script writes the URL on the page given in the action attribute Figure 14-3 shows the result of this script when run in a browser
The elements Property (Array)
The elements property is an array that allows you to access each element within a specific form in the same order it appears in the code, starting from 0 It works much like the forms array but has an entry for each element in a given form To use the elements array to access an element in a form, use the index number for the element you want to access For instance, the following form has two elements:
<form name="info_form"> Name: <input type="text" /><br /> <input type="submit" /> </form>
Figure 14-3 The value of the action attribute in the form is printed on the page
JavaScript: A Beginner s Guide
To access the first element (the text box), you can use the syntax shown here:
documentinfo_formelements[0]
Alternatively, if you want to use the forms array (assume this is the first form on the page), you could use this syntax:
documentforms[0]elements[0]
Yet another option to access the text box is to name it (like with the form) and access it using its name You can do this with each element, as well as the form itself; you can choose which method is best for accessing a form and its elements in each situation The following code gives the form and the text box a name, and allows you to access them using those names:
<form name="info_form"> Name: <input type="text" name="yourname"><br /> <input type="submit"> </form>
In this case, you could access the text box using the form name and the text box name, as in the syntax shown here:
documentinfo_formyourname
Also, you can of course use the id method:
<form> Name: <input type="text" id="yourname"><br /> <input type="submit"> </form>
Then, you can access the input element using documentgetElementById():
documentgetElementByID("yourname");
To create scripts that use the elements of a form, you must be able to access a property for a form element Each form element is an instance of an object with its own properties and methods, as shown in Table 14-2 The form elements all have their own selection of properties and methods, but many of them are used with most or all of the form elements The following sections look in more detail at the properties and methods listed in Table 14-2 and how they are used with the form elements
Copyright © OnBarcode.com . All rights reserved.