import "code.google.com/p/go.net/html/atom"
atom包提供了经常出现的HTML字符串（标签名和属性名，如"p"和"id"）的整数码（也被成为atom）。
在提取HTML的token和解析时，所有共用同一个标签的元素可以共享一个atom名，可以实现更少的字符串申请。整数的比较一般也比字符串的比较更快。
atom的具体码值；不保证在本包不同版本保持一致；不保证atom的码值顺序；不保证码值连续分布。只保证例如"div"对应atom.Div，调用atom.Div.String会返回"div"，且atom.Div != 0。
func String(s []byte) string
String返回一个字符串，其内容和s相同。本函数等价于 string(s)但更有效率。
type Atom uint32
Atom是字符串的整数码，零值代表""。
const (
A Atom = 0x1
Abbr Atom = 0x4
Accept Atom = 0x2106
AcceptCharset Atom = 0x210e
Accesskey Atom = 0x3309
Action Atom = 0x21b06
Address Atom = 0x5d507
Align Atom = 0x1105
Alt Atom = 0x4503
Annotation Atom = 0x18d0a
AnnotationXml Atom = 0x18d0e
Applet Atom = 0x2d106
Area Atom = 0x31804
Article Atom = 0x39907
Aside Atom = 0x4f05
Async Atom = 0x9305
Audio Atom = 0xaf05
Autocomplete Atom = 0xd50c
Autofocus Atom = 0xe109
Autoplay Atom = 0x10c08
B Atom = 0x101
Base Atom = 0x11404
Basefont Atom = 0x11408
Bdi Atom = 0x1a03
Bdo Atom = 0x12503
Bgsound Atom = 0x13807
Big Atom = 0x14403
Blink Atom = 0x14705
Blockquote Atom = 0x14c0a
Body Atom = 0x2f04
Border Atom = 0x15606
Br Atom = 0x202
Button Atom = 0x15c06
Canvas Atom = 0x4b06
Caption Atom = 0x1e007
Center Atom = 0x2df06
Challenge Atom = 0x23e09
Charset Atom = 0x2807
Checked Atom = 0x33f07
Cite Atom = 0x9704
Class Atom = 0x3d905
Code Atom = 0x16f04
Col Atom = 0x17603
Colgroup Atom = 0x17608
Color Atom = 0x18305
Cols Atom = 0x18804
Colspan Atom = 0x18807
Command Atom = 0x19b07
Content Atom = 0x42c07
Contenteditable Atom = 0x42c0f
Atom = 0x3480b
Controls Atom = 0x1ae08
Coords Atom = 0x1ba06
Crossorigin Atom = 0x1c40b
Data Atom = 0x44304
Datalist Atom = 0x44308
Datetime Atom = 0x25b08
Dd Atom = 0x28802
Default Atom = 0x5207
Defer Atom = 0x17105
Del Atom = 0x4d603
Desc Atom = 0x4804
Details Atom = 0x6507
Dfn Atom = 0x8303
Dialog Atom = 0x1b06
Dir Atom = 0x9d03
Dirname Atom = 0x9d07
Disabled Atom = 0x10008
Div Atom = 0x10703
Dl Atom = 0x13e02
Download Atom = 0x40908
Draggable Atom = 0x1a109
Dropzone Atom = 0x3a208
Dt Atom = 0x4e402
Em Atom = 0x7f02
Embed Atom = 0x7f05
Enctype Atom = 0x23007
Face Atom = 0x2dd04
Fieldset Atom = 0x1d508
Figcaption Atom = 0x1dd0a
Figure Atom = 0x1f106
Font Atom = 0x11804
Atom = 0x5906
For Atom = 0x1fd03
ForeignObject Atom = 0x1fd0d
Foreignobject Atom = 0x20a0d
Form Atom = 0x21704
Formaction Atom = 0x2170a
Formenctype Atom = 0x22c0b
Formmethod Atom = 0x2470a
Formnovalidate Atom = 0x2510e
Formtarget Atom = 0x2660a
Frame Atom = 0x8705
Frameset Atom = 0x8708
H1 Atom = 0x13602
H2 Atom = 0x29602
H3 Atom = 0x2c502
H4 Atom = 0x30e02
H5 Atom = 0x4e602
H6 Atom = 0x27002
Head Atom = 0x2fa04
Header Atom = 0x2fa06
Headers Atom = 0x2fa07
Height Atom = 0x27206
Hgroup Atom = 0x27a06
Hidden Atom = 0x28606
High Atom = 0x29304
Hr Atom = 0x13102
Href Atom = 0x29804
Hreflang Atom = 0x29808
Html Atom = 0x27604
HttpEquiv Atom = 0x2a00a
I Atom = 0x601
Icon Atom = 0x42b04
Id Atom = 0x5102
Iframe Atom = 0x2b406
Image Atom = 0x2ba05
Img Atom = 0x2bf03
Inert Atom = 0x4c105
Input Atom = 0x3f605
Ins Atom = 0x1cd03
Isindex Atom = 0x2c707
Ismap Atom = 0x2ce05
Itemid Atom = 0x9806
Itemprop Atom = 0x57e08
Itemref Atom = 0x2d707
Itemscope Atom = 0x2e509
Itemtype Atom = 0x2ef08
Kbd Atom = 0x1903
Keygen Atom = 0x3906
Keytype Atom = 0x51207
Kind Atom = 0xfd04
Label Atom = 0xba05
Lang Atom = 0x29c04
Legend Atom = 0x1a806
Li Atom = 0x1202
Link Atom = 0x14804
List Atom = 0x44704
Listing Atom = 0x44707
Loop Atom = 0xbe04
Low Atom = 0x13f03
Malignmark Atom = 0x100a
Manifest Atom = 0x5b608
Map Atom = 0x2d003
Mark Atom = 0x1604
Marquee Atom = 0x5f207
Math Atom = 0x2f704
Max Atom = 0x30603
Maxlength Atom = 0x30609
Media Atom = 0xa205
Mediagroup Atom = 0xa20a
Menu Atom = 0x34f04
Meta Atom = 0x45604
Meter Atom = 0x26105
Method Atom = 0x24b06
Mglyph Atom = 0x2c006
Mi Atom = 0x9b02
Min Atom = 0x31003
Mn Atom = 0x25402
Mo Atom = 0x47a02
Ms Atom = 0x2e802
Mtext Atom = 0x31305
Multiple Atom = 0x32108
Muted Atom = 0x32905
Name Atom = 0xa004
Atom = 0x3e03
Nobr Atom = 0x7404
Noembed Atom = 0x7d07
Noframes Atom = 0x8508
Noscript Atom = 0x28b08
Novalidate Atom = 0x2550a
Object Atom = 0x21106
Ol Atom = 0xcd02
Onabort Atom = 0x16007
Onafterprint Atom = 0x1e50c
Onbeforeprint Atom = 0x21f0d
Onbeforeunload Atom = 0x5c90e
Onblur Atom = 0x3e206
Oncancel Atom = 0xb308
Oncanplay Atom = 0x12709
Oncanplaythrough Atom = 0x12710
Onchange Atom = 0x3b808
Onclick Atom = 0x2ad07
Onclose Atom = 0x32e07
Atom = 0x3460d
Oncuechange Atom = 0x3530b
Ondblclick Atom = 0x35e0a
Ondrag Atom = 0x36806
Ondragend Atom = 0x36809
Ondragenter Atom = 0x3710b
Ondragleave Atom = 0x37c0b
Ondragover Atom = 0x3870a
Ondragstart Atom = 0x3910b
Ondrop Atom = 0x3a006
Ondurationchange Atom = 0x3b010
Onemptied Atom = 0x3a709
Onended Atom = 0x3c007
Onerror Atom = 0x3c707
Onfocus Atom = 0x3ce07
Onhashchange Atom = 0x3e80c
Oninput Atom = 0x3f407
Oninvalid Atom = 0x3fb09
Onkeydown Atom = 0x40409
Onkeypress Atom = 0x4110a
Onkeyup Atom = 0x42107
Onload Atom = 0x43b06
Onloadeddata Atom = 0x43b0c
Onloadedmetadata Atom = 0x44e10
Onloadstart Atom = 0x4640b
Onmessage Atom = 0x46f09
Onmousedown Atom = 0x4780b
Onmousemove Atom = 0x4830b
Onmouseout Atom = 0x48e0a
Onmouseover Atom = 0x49b0b
Onmouseup Atom = 0x4a609
Onmousewheel Atom = 0x4af0c
Onoffline Atom = 0x4bb09
Ononline Atom = 0x4c608
Onpagehide Atom = 0x4ce0a
Onpageshow Atom = 0x4d90a
Onpause Atom = 0x4e807
Onplay Atom = 0x4f206
Onplaying Atom = 0x4f209
Onpopstate Atom = 0x4fb0a
Onprogress Atom = 0x5050a
Onratechange Atom = 0x5190c
Onreset Atom = 0x52507
Onresize Atom = 0x52c08
Onscroll Atom = 0x53a08
Onseeked Atom = 0x54208
Onseeking Atom = 0x54a09
Onselect Atom = 0x55308
Onshow Atom = 0x55d06
Onstalled Atom = 0x56609
Onstorage Atom = 0x56f09
Onsubmit Atom = 0x57808
Onsuspend Atom = 0x58809
Ontimeupdate Atom = 0x1190c
Onunload Atom = 0x59108
Onvolumechange Atom = 0x5990e
Onwaiting Atom = 0x5a709
Open Atom = 0x58404
Optgroup Atom = 0xc008
Optimum Atom = 0x5b007
Option Atom = 0x5c506
Output Atom = 0x49506
P Atom = 0xc01
Param Atom = 0xc05
Pattern Atom = 0x6e07
Ping Atom = 0xab04
Placeholder Atom = 0xc70b
Plaintext Atom = 0xf109
Poster Atom = 0x17d06
Pre Atom = 0x27f03
Preload Atom = 0x27f07
Progress Atom = 0x50708
Prompt Atom = 0x5bf06
Public Atom = 0x42706
Q Atom = 0x15101
Radiogroup Atom = 0x30a
Readonly Atom = 0x31908
Rel Atom = 0x28003
Required Atom = 0x1f508
Reversed Atom = 0x5e08
Rows Atom = 0x7704
Rowspan Atom = 0x7707
Rp Atom = 0x1eb02
Rt Atom = 0x16502
Ruby Atom = 0xd104
S Atom = 0x2c01
Samp Atom = 0x6b04
Sandbox Atom = 0xe907
Scope Atom = 0x2e905
Scoped Atom = 0x2e906
Script Atom = 0x28d06
Seamless Atom = 0x33308
Section Atom = 0x3dd07
Select Atom = 0x55506
Selected Atom = 0x55508
Shape Atom = 0x1b505
Size Atom = 0x53004
Sizes Atom = 0x53005
Small Atom = 0x1bf05
Source Atom = 0x1cf06
Spacer Atom = 0x30006
Span Atom = 0x7a04
Spellcheck Atom = 0x33a0a
Src Atom = 0x3d403
Srcdoc Atom = 0x3d406
Srclang Atom = 0x41a07
Start Atom = 0x39705
Step Atom = 0x5bc04
Strike Atom = 0x50e06
Strong Atom = 0x53406
Style Atom = 0x5db05
Sub Atom = 0x57a03
Summary Atom = 0x5e007
Sup Atom = 0x5e703
Svg Atom = 0x5ea03
System Atom = 0x5ed06
Tabindex Atom = 0x45c08
Table Atom = 0x43605
Target Atom = 0x26a06
Tbody Atom = 0x2e05
Td Atom = 0x4702
Textarea Atom = 0x31408
Tfoot Atom = 0x5805
Th Atom = 0x13002
Thead Atom = 0x2f905
Time Atom = 0x11b04
Title Atom = 0x8e05
Tr Atom = 0xf902
Track Atom = 0xf905
Translate Atom = 0x16609
Tt Atom = 0x7002
Type Atom = 0x23304
Typemustmatch Atom = 0x2330d
U Atom = 0xb01
Ul Atom = 0x5602
Usemap Atom = 0x4ec06
Value Atom = 0x4005
Var Atom = 0x10903
Video Atom = 0x2a905
Wbr Atom = 0x14103
Width Atom = 0x4e205
Wrap Atom = 0x56204
Xmp Atom = 0xef03
)
func Lookup(s []byte) Atom
Lookup返回名为s的Atom。如果不存在该Atom会返回零值。本函数是大小写敏感的。
func (a Atom) String() string
String返回Atom的名称。