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JavaScript Basics

Inserting Javascript

Complete Tutorial

Advance DHTML Tutorial


Script Debugger
Having trouble adding a JavaScript to your site? Just can't get things working? Add this short script to your site, and it will report to you JavaScript errors as they happen in a box on the screen. The idea is that you will see what the error is, and hopefully give you some ideas on how to fix it. I actually use this script when I debug scripts!

For this example, clicking this button will cause a JavaScript error, that the function is not defined. The error will be displayed in the box below.

Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function reportError(msg,url,line) { var str = "Err: " + msg + " on line: " + line + "\nURL: " + url + "\nWeb: " + navigator.appName + " " + navigator.appName + " " + navigator.appVersion; document.errform.error.value = str; return true; } window.onerror = reportError; // End --> </script> </HEAD>

Insert into <BODY>
<form name=errform> <textarea name=error rows=5 cols=70></textarea> </form> <!--For this example, clicking this button will cause a JavaScript error, that<br>the function is not defined. The error will be displayed in the box below.--> <form name=err> <input type=button value="Cause JS Error" onClick="brokenScript()"> </form>

Other Options