Unit 17.4. Find and Debug JavaScript Errors
Configure Your Browser to Show JavaScript Errors
Set your browser’s preferences to alert you when there is a JavaScript error. You may have seen alert windows pop up as you browse through other sites on the Web, or as you have worked on your own JavaScript code. Refer to Chapter 7, “Introduction to JavaScript,” for instructions on how to set your browser preferences to give you more information about JavaScript errors.
Make Use of JavaScript Alerts
JavaScript alerts are a handy way to find out the value of an object or parameter or to see what the value of a form object is. Once you have found out what you need to know, delete any extra alerts from your code.
Figure 17.1 is an example of an alert ...
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