JavaScript保留关键字及危险变量名 定义变量名需谨慎

在开发过程当中，如果没有必要就尽可能少的使用以下列出的单词作为变量名称或者属性名称，关键字是严格不允许，而浏览器定义的变量名或者类名在使用的时候注意确保作用域

一、现在 EMCAScript 中的关键字：

break	case	catch	continue
default	delete	do	else
finally	for	function	if
in	instanceof	new	return
switch	this	throw	try
typeof	var	void	while
with

二、将来EMCAScript 5中可能使用的关键字：

abstract	boolean	byte	char
class	debugger	double	enum
extends	final	float	goto
implements	int	interface	long
native	package	private	protected
public	short	static	super
synchronized	throws	transient	volatile

三、 JavaScript2.0（future） 不明确提到的关键字：

as	const	export	import
is	use

四、绝大部分浏览器中预定义的一些变量名和类名：

Anchor	anchors	Applet	applets
Area	Array	Body	Button
Checkbox	Date	document	Error
EvalError	FileUpload	Form	forms
frame	frames	Function	Hidden
History	history	Image	images
Link	links	location	Math
MimeType	mimetypes	navigator	Number
Object	Option	options	Password
Plugin	plugins	Radio	RangeError
ReferenceError	RegExp	Reset	screen
Script	Select	String	Style
StyleSheet	Submit	SyntaxError	Text
Textarea	TypeError	URIError	window

五、全局属性及方法：

Infinity	NaN	undefined	decodeURI
decodeURIComponent	encodeURI	encodeURIComponent	escape
eval	isFinite	isNaN	parseFloat
parseInt	unescape

六、Window对象的属性和方法：

1、property:

closed	Components	content	controllers
defaultStatus	directories	document	frames
history	innerHeight	innerWidth	length
location	locationbar	menubar	name
navigator	opener	outerHeight	outerWidth
pageXOffset	pageYOffset	parent	personalbar
pkcs11	prompter	screen	screenX
screenY	scrollbars	scrollX	scrollY
self	statusbar	toolbar	top
window

2、Methods:

alert	back	blur	captureevents
clearInterval	clearTimeout	close	confirm
dump	escape	focus	forward
getAttention	getSelection	home	moveBy
moveTo	open	print	prompt
releaseevents	resizeBy	resizeTo	scroll
scrollBy	scrollByLines	scrollByPages	scrollTo
setCursor	setInterval	setTimeout	sizeToContents
stop	unescape	updateCommands

七、事件：

onabort	onblur	onchange	onclick
onclose	ondragdrop	onerror	onfocus
onkeydown	onkeypress	onkeyup	onload
onmousedown	onmousemove	onmouseout	onmouseover
onmouseup	onpaint	onreset	onresize
onscroll	onselect	onsubmit	onunload

八、特定浏览器中预定义的变量名和类名：

all	assign	clientInformation	element
embed	embeds	event	frameRate
getClass	java	JavaArray	JavaClass
JavaObject	JavaPackage	layer	layers
netscape	offscreenBuffering	opener	packages
secure	status	sun	taint
toSource	toString	untaint	valueOf

原文地址：http://www.qianduanzu.com/2012033020.html