A CSS class is best, you can assign it to any element on any page at any time
What can be more time-saving?
...<img class="hide" src="image.gif" alt="" />...
...<div class="hide"><!-- hidden content --></div>...
...<p class="hide">hidden text</p>...
That seems much easier using the
<div class="hide"><!-- hidden content --></div> and css
Thank you for explaining it aziz
Here is a simple suggestion: Just change the color of the text of the text to the that as the background, so its technically invisible unless to highlight it :D
Google would still crawl and even index substance hidden by CSS. If you aim to absolutely hide the source code of specific substance from google then it's called cloaking.