Determining Whether a Checkbox Object Is Checked

 
<html>
<head>
<title>Online Registration</title>
<SCRIPT LANGUAGE="JavaScript">
     function selectText(currentObject) {
          if (document.form1.selectBox.checked) {
               currentObject.select()
          }
     }
</SCRIPT>
</head>
<body>
    <form name="form1" method="POST">
    <h2>Online Registration</h2>
    <p>Username:<br>
    <input type=text size=25 maxlength=256 name="Username" onFocus="selectText(this)">
    <br>Browser used:<br>
    <input type=text size=25 maxlength=256 name="Browser" onFocus="selectText(this)">
    <br>
    Email address:<strong> <br>
    </strong>
    <input type=text size=25 maxlength=256 name="EmailAddress" onFocus="selectText(this)">
    </p>
    
    <h2>
    <input type=submit value="Register"> 
    <input type=reset value="Clear">
    </h2>
    <p>
    <input type=checkbox name="selectBox">Activate field selection.
    </form>
</body>
</html>

Related examples in the same category

1.	Call 'click()' to triger event
2.	'defaultChecked' Example
3.	Check status Example
4.	'indeterminate' Example
5.	CheckBox check action
6.	Using the HTML Form Elements Array
7.	Checkbox in a form
8.	Check and uncheck a checkbox
9.	Checkboxes in a form
10.	Checkbox Action
11.	The Checkbox Object's checked Property
12.	The checked Property as a Conditional
13.	A Checkbox and an onClick event Handler
14.	Check a CheckBox
15.	Is checked
16.	Methods and Properties of the Checkbox Object
17.	A Checkbox and an onclick Event Handler
18.	A Checkbox, an onclick Event Handler and show/hide form controls
19.	Get value from check box

Determining Whether a Checkbox Object Is Checked : CheckBox « Form Control « JavaScript DHTML

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