Dynamic HTML: The Definitive Reference

5.4. ECMAScript Reserved Keywords

The following case-sensitive words may not be used as identifier names:

abstract

boolean

break

byte

case

catch

char

class

const

continue

debugger

default

delete

do

double

else

enum

export

extends

final

finally

float

for

function

goto

if

implements

import

in

instanceof

int

interface

long

native

new

package

private

protected

public

return

short

static

super

switch

synchronized

this

tHRow

tHRows

TRansient

TRy

typeof

var

void

volatile

while

with

Many of these words are already used in existing JavaScript versions, while the rest are reserved for possible use in future versions.

The following case-sensitive words may not be used as identifier names in E4X scripts:

each

namespace

XML