最近看到一個(gè)詞叫css reset。什么叫做css reset呢？我理解為重置css，也就是重置默認(rèn)樣式。

我在HTML下的默認(rèn)樣式中講到，一些標(biāo)簽元素在HTML下有一個(gè)默認(rèn)屬性值，我們?cè)趯?xiě)css頁(yè)面的時(shí)候，為了避免在css中重復(fù)定義它們，我們需要重置默認(rèn)樣式（css reset）。每個(gè)人的用法和寫(xiě)法都不一樣。找到一篇關(guān)于css reset的調(diào)查文章， 可以看看國(guó)外使用css reset的比例調(diào)查。

接下來(lái)我也查看了國(guó)內(nèi)的兩個(gè)網(wǎng)站，用Firebug按F12看看他們的css reset怎么寫(xiě)的？
淘寶（www.taobao.com）：

html 
{ 
overflow-x:auto; 
overflow-y:scroll; 
} 
body, dl, dt, dd, ul, 
ol, li, pre, form, fieldset, input, p, blockquote, th, td { 
font-weight:400; 
margin:0; 
padding:0; 
} 
h1, h2, h3, h4, h4, h5 { 
margin:0; 
padding:0; 
} 
body { 
background-color:#FFFFFF; 
color:#666666; 
font-family:Helvetica,Arial,sans-serif; 
font-size:12px; 
padding:0 
10px; 
text-align:left; 
} 
select { 
font-size:12px; 
} 
table { 
border-collapse:collapse; 
} 
fieldset, img { 
border:0 
none; 
} 
fieldset { 
margin:0; 
padding:0; 
} 
fieldset p { 
margin:0; 
padding:0 0 0 8px; 
} 
legend { 
display:none; 
} 
address, caption, em, strong, th, i { 
font-style:normal; 
font-weight:400; 
} 
table caption { 
margin-left:-1px; 
} 
hr { 
border-bottom:1px solid #FFFFFF; 
border-top:1px solid #E4E4E4; 
border-width:1px 0; 
clear:both; 
height:2px; 
margin:5px 0; 
overflow:hidden; 
} 
ol, ul { 
list-style-image:none; 
list-style-position:outside; 
list-style-type:none; 
} 
caption, th 
{ 
text-align:left; 
} 
q:before, q:after, blockquote:before, 
blockquote:after { 
content:""; 
}

百度有啊(www.youa.com)：（架構(gòu)基本上是模仿YUI來(lái)做的）?

body { 
font-family:arial,helvetica,sans-serif; 
font-size:13px; 
font-size-adjust:none; 
font-stretch:normal; 
font-style:normal; 
font-variant:normal; 
font-weight:normal; 
line-height:1.4; 
text-align:center; 
} 
body, ul, ol, dl, dd, h1, h2, h3, h4, h5, h6, 
p, form, fieldset, legend, input, textarea, select, button, th, td { 
margin:0; 
padding:0; 
} 
h1, h2, h3, h4, h5, h6 { 
font-size:100%; 
font-weight:normal; 
} 
table { 
font-size:inherit; 
} 
input, select { 
font-family:arial,helvetica,clean,sans-serif; 
font-size:100%; 
font-size-adjust:none; 
font-stretch:normal; 
font-style:normal; 
font-variant:normal; 
font-weight:normal; 
line-height:normal; 
} 
button { 
overflow:visible; 
} 
th, em, strong, b, address, cite { 
font-style:normal; 
font-weight:normal; 
} 
li { 
list-style-image:none; 
list-style-position:outside; 
list-style-type:none; 
} 
img, fieldset { 
border:0 none; 
} 
ins { 
text-decoration:none; 
}

在《超越css》一書(shū)中建議我們做網(wǎng)站開(kāi)始重置所有默認(rèn)樣式：

/* Normalizes margin,padding */ 
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,p,blockquote,th,td 
{ margin:0;padding:0} 
/* Normalizes font-size for headers */ 
h1,h2,h3,h4,h5,h6 { font-size:100%} 
/* Removes list-style from lists */ 
ol,ul { list-style:none } 
/* Normalizes font-size and font-weight to 
normal */ 
address,caption,cite,code,dfn,em,strong,th,var { font-size:normal; 
font-weight:normal } 
/* Removes list-style from lists */ 
table { 
border-collapse:collapse; border-spacing:0 } 
/* Removes border from fieldset 
and img */ 
fieldset,img { border:0 } 
/* Left-aligns text in caption and 
th */ 
caption,th { text-align:left } 
/* Removes quotation marks from q 
*/ 
q:before,q:after { content:''}

那我們實(shí)際寫(xiě)代碼的時(shí)候該怎么來(lái)css reset呢？
我個(gè)人推薦使用（Eric Meyer和YUI）的 css reset

Eric Meyer's Reset: 
html, body, 
div, span, applet, object, iframe, 
h1, h2, h3, h4, h5, h6, p, blockquote, 
pre, 
a, abbr, acronym, address, big, cite, code, 
del, dfn, em, font, 
img, ins, kbd, q, s, samp, 
small, strike, strong, sub, sup, tt, var, 
b, 
u, i, center, 
dl, dt, dd, ol, ul, li, 
fieldset, form, label, legend, 
table, caption, tbody, tfoot, thead, tr, th, td { 
margin: 0; 
padding: 0; 
border: 0; 
outline: 0; 
font-size: 100%; 
vertical-align: baseline; 
background: transparent; 
} 
body { 
line-height: 1; 
} 
ol, ul { 
list-style: none; 
} 
blockquote, q { 
quotes: none; 
} 
blockquote:before, 
blockquote:after, 
q:before, q:after { 
content: ''; 
content: none; 
} 
/* remember to define focus styles! */ 
:focus { 
outline: 0; 
} 
/* remember to highlight inserts somehow! */ 
ins { 
text-decoration: none; 
} 
del { 
text-decoration: line-through; 
} 
/* tables still need 'cellspacing="0"' in the markup */ 
table { 
border-collapse: collapse; 
border-spacing: 0; 
} 
YUI: 
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td 
{ 
margin:0; 
padding:0; 
} 
table { 
border-collapse:collapse; 
border-spacing:0; 
} 
fieldset,img { 
border:0; 
} 
address,caption,cite,code,dfn,em,strong,th,var { 
font-style:normal; 
font-weight:normal; 
} 
ol,ul { 
list-style:none; 
} 
caption,th { 
text-align:left; 
} 
h1,h2,h3,h4,h5,h6 { 
font-size:100%; 
font-weight:normal; 
} 
q:before,q:after { 
content:''; 
} 
abbr,acronym { border:0; 
}

結(jié)合他們的css reset寫(xiě)法，再根據(jù)自己的實(shí)際情況，一定能寫(xiě)出符合自己網(wǎng)站的完美的css reset。