Checkbox.onFocus : CheckBox « Form « JavaScript Tutorial






  1. JavaScript Tutorial
  2. Form
  3. CheckBox

Syntax

onFocus="command"

The onFocus event handler is defined in an tag and specifies what to do when a check box gains focus.

<html>
    <form name="orderForm">
      <input type="checkbox"
             name="peppers">Peppers<br>
      <input type="checkbox"
             name="sausage"
             onFocus="chooseExtraCheese()">Sausage<br>
      <input type="checkbox"
             name="cheese">Extra Cheese<hr>
      <input type="button"
             value="Order Pizza"
             name="orderButton"
             onClick="alert('ordered.')">
    </form>
    <script language="JavaScript">
    <!--
    function chooseExtraCheese()
    {
      if(document.orderForm.sausage.checked == false)
      {
        document.orderForm.cheese.checked = true;
      }
    }
    document.write("checkbox onFocus event handler: ");

    document.write(document.orderForm.sausage.onFocus);

    -->
    </script>
    </html>








10.7.CheckBox
10.7.1.Checkbox
10.7.2.Checkbox.blur()
10.7.3.Checkbox.checked
10.7.4.Checkbox.click()
10.7.5.Checkbox.defaultChecked
10.7.6.Checkbox.focus()
10.7.7.Checkbox.form
10.7.8.Checkbox.handleEvent()
10.7.9.Checkbox.name
10.7.10.Checkbox.onBlur
10.7.11.Checkbox.onClick
10.7.12.Checkbox.onFocus
10.7.13.Checkbox.type
10.7.14.Checkbox.value
10.7.15.Check if a CheckBox checked
10.7.16.With with RADIO and CheckBox
10.7.17.Use checkbox to control the window style
10.7.18.A Checkbox and an onclick Event Handler
10.7.19.A Checkbox, an onclick Event Handler and show/hide form controls