JavaScript A Beginners Guide 4E by John Pollock

Author:John Pollock
Language: eng
Format: epub, pdf
Tags: -
Publisher: McGraw-Hill Education
Published: 2013-03-20T04:00:00+00:00

Simple Event Handling

So far, your scripts have simply run during the loading (or reloading) of the Web page. This is good for a number of tasks, but many, such as node and style changes, would be more useful if they were executed in response to an action taken by the user. For instance, changing the background color of an element while the page is loading may not even be noticed by the viewer, but changing the color in response to a mouse click would allow the viewer to see the change and provide the choice of leaving the original color or changing to the new color via a click.

The click Event

The click event is available for most elements within the DOM. This event is triggered when the user clicks the primary mouse button while the mouse pointer is over a specific element. One way to gain control of the click event is through onclick, as shown in the following code (other methods will be covered in the next chapter):

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