Accessing and Writing Information : Elements « Form « JavaScript Tutorial

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JavaScript Tutorial » Form » Elements 
10. 4. 1. Accessing and Writing Information

The form object contains an elements array.

The elements array are indexed in the order they appear, and you can access a specific element by its NAME instead of index number.

Using Different Methods of Accessing Form Elements

<HTML>
<HEAD>
<TITLE>Example of Accessing Form Elements</TITLE>
    <SCRIPT LANGUAGE="JavaScript">
    <!--
    function showCar(){
      var car = document.pref.elements[0].value;
      alert("Your favorite car is: " + car);
    }
    function showColor(){
      var color = document.pref.color.value;
      alert("Your favorite color is: " + color);
    }
    // End hide-->
    </SCRIPT>
    </HEAD>
    <BODY>
    <FORM NAME="pref" METHOD=POST>
    Enter the name of your favorite car:
      <INPUT TYPE="text" NAME="car" SIZE=25>
      <INPUT TYPE="BUTTON" NAME="carButton" VALUE="Show Car" onClick="showCar(this.form)">
    <BR>
    Enter your favorite color:
      <INPUT TYPE="text" NAME="color" SIZE=15>
      <INPUT TYPE="BUTTON" NAME="colorButton" VALUE="Show Color" onClick="showColor(this.form)">
    </FORM>
    </BODY>
</HTML>
10. 4. Elements
10. 4. 1. Accessing and Writing Information
10. 4. 2. Writing information to forms.
10. 4. 3. Reference form element by using the dot notation
10. 4. 4. Loop through all elements in a form
10. 4. 5. Check Form element type
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