August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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Checkbox.onFocus
JavaScript 1.1+, JScript 3.0+ Nav3+, IE 4+ Syntax
onFocus="command"
Description
The onFocus event handler is defined in an <input> tag and specifies what to do when a check box gains focus.
Example
The code in Listing 7.46 uses the onFocus event handler to automatically select extra cheese when the customer selects sausage.
Listing 7.46 Using the onFocus Event Handler to Select Extra Cheese
<html> <h2>Pizza Machine</h2> Step1: Please select your pizza toppings:<BR> <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> Step 2: <input type="button" value="Order Pizza" ... |
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