if you like programming in javascript you will find out that there are some words that need to be reserved for your programming. there are some words you cannot use these are my list of do not use:

so keep this rule when naming your variables is to avoid the use of javascript reserved words. these are special words that are used for specific purpose in javasscript. for example, you've learned that the reserved word var is used to declare a javascript variable. using it as a variable name can cause numberous problesm in your scripts, since this word is meant to be used in a different way. the next table lists the reserved words in javascript. note that tall these words are used so they will become more familiar to you as you start to code more javascript.

abstract	delete	function	null	throw
boolean	do	goto	package	throws
break	double	if	private	transient
byte	else	implements	protected	true
case	enum	import	public	try
catch	export	in	return	typeof
char	extends	instanceof	short	var
class	false	int	static	void
const	final	interface	super	volatile
continue	finally	long	switch	while
debugger	float	native	synchronized	with
default	for	new	this