CSS and DHTML

DHTML

Testing for features

One possibility is to use Javascript to query the browser to see if a particular feature or object is available

This method is not testing for the presence of the browser's DOM directly

It can be used to test for any feature

It requires an additional page that appears before the page using the features for which you are testing

The markup looks like this:

if (document.images) {
    document.write('Image-swapping is available here!');
    }
else {
    document.write('No image-swapping allowed here');
    }

</script>

This script uses a conditional (if --> else) statement to test the browser

The document.write function instructs the browser to take an action depending on the outcome of the conditional test

To test for the presence of a different feature, provide the DOM filepath for that feature

Here's an example (close the window to return to this page)

Next!

You are here: http://memex.lib.indiana.edu/hrosenba/www/Workshops/CSS/Demo/cssdhtm2.html
Last updated 3.15.06 - H. Rosenbaum