Unit 17.5. Find and Debug HTML Errors
View Source Code
HTML errors are easiest to figure out by looking at the source code that the browser received. This source code is all that the browser has to work with, so it is the place to look for errors.
Commercial software can check HTML for you. Also try the HTML validator at http://www.w3c.org.
Place Form Elements in Forms
If a form button does not appear on a page, check whether it was placed within a form. Some browsers will not display a button that is outside of a form. The form may be very small and only include the button, but it must be present. Even if the button has a JavaScript event attached to it, and does not necessarily need to be in a form, you should still include it within a form ...
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