不同瀏覽器對于相同元素的默認樣式并不一致，而且不同內核的瀏覽器在某些控件（元素）的表現上也是各有差異，比如字體、縮進等等，這些問題都是由于瀏覽器的默認樣式（CSS）在作怪，下面西部e網整理了一份瀏覽器默認css的樣式表文件，包括了IE各版本、Firefox、Opera、Webkit等供大家參考：

IE6瀏覽器默認CSS樣式表

[dir=rtl] dd {
 margin: 0 30pt 0 0;
}

[dir=rtl] menu {
 margin: 14pt 30pt 14pt 0;
}

[dir=rtl] ol {
 margin: 14pt 30pt 14pt 0;
}

[dir=rtl] ul {
 margin: 14pt 30pt 14pt 0;
}

a {
 color: #00F;
 text-decoration: underline;
}

a:visited {
 color: #80080;
}

address {
 display: block;
 font-style: italic;
}

b {
 font-weight: bold;
}

bdo {
 direction: rtl;
 unicode-bidi: bidi-override;
}

blockquote {
 display: block;
 margin: 14pt 30pt;
}

body {
 display: block;
 margin: 15px 10px;
 zoom: 1;
}

button {
 background-color: #D4D0C8;
 border-style: outset;
 border-width: 2px;
 font-family: sans-serif;
 font-size: 10pt;
 overflow: hidden;
 text-align: center;
 zoom: 1;
}

caption {
 display: block;
 padding: 1px 3px 5px;
 text-align: center;
 zoom: 1;
}

cite {
 font-style: italic;
}

code {
 font-family: monospace;
 font-size: 10pt;
}

col {
 border-color: #D4D0C8;
 display: block;
}

colgroup {
 border-color: #D4D0C8;
 display: block;
}

dd {
 display: block;
 margin: 0 0 0 30pt;
}

del {
 text-decoration: line-through;
}

dfn {
 font-style: italic;
}

div {
 display: block;
}

dl {
 display: block;
 margin: 14pt 0;
}

dt {
 display: block;
}

em {
 font-style: italic;
}

embed {
 zoom: 1;
}

fieldset {
 border-style: groove;
 border-width: 2px;
 display: block;
 zoom: 1;
}

form {
 display: block;
 margin: 14pt 0;
}

h1 {
 display: block;
 font-size: 24pt;
 font-weight: bold;
 margin: 14pt 0;
}

h2 {
 display: block;
 font-size: 18pt;
 font-weight: bold;
 margin: 14pt 0;
}

h3 {
 display: block;
 font-size: 13.55pt;
 font-weight: bold;
 margin: 14pt 0;
}

h4 {
 display: block;
 font-weight: bold;
 margin: 14pt 0;
}

h5 {
 display: block;
 font-size: 10pt;
 font-weight: bold;
 margin: 14pt 0;
}

h6 {
 display: block;
 font-size: 7.55pt;
 font-weight: bold;
 margin: 14pt 0;
}

hr {
 text-align: center;
 zoom: 1;
}

html {
 overflow-x: auto;
 overflow-y: scroll;
 zoom: 1;
}

i {
 font-style: italic;
}

iframe {
 background-color: #FFF;
 height: 150px;
 width: 300px;
 zoom: 1;
}

img {
 zoom: 1;
}

input {
 background-color: #FFF;
 border-style: inset;
 border-width: 2px;
 font-family: sans-serif;
 font-size: 10pt;
 overflow: hidden;
 padding: 1px;
 zoom: 1;
}

ins {
 text-decoration: underline;
}

kbd {
 font-family: monospace;
 font-size: 10pt;
}

legend {
 zoom: 1;
}

li {
 display: block;
}

menu {
 display: block;
 list-style-image: none;
 list-style-position: outside;
 list-style-type: disc;
 margin: 14pt 0 14pt 30pt;
}

object {
 zoom: 1;
}

ol {
 display: block;
 list-style-image: none;
 list-style-position: outside;
 list-style-type: decimal;
 margin: 14pt 0 14pt 30pt;
}

optgroup {
 font-family: sans-serif;
 font-size: 10pt;
 font-style: italic;
 font-weight: bold;
}

option {
 font-family: sans-serif;
 font-size: 10pt;
 font-style: italic;
 font-weight: bold;
}

p {
 display: block;
}

pre {
 display: block;
 font-family: monospace;
 font-size: 10pt;
 white-space: pre;
}

rp {
 font-size: 6pt;
}

rt {
 font-size: 6pt;
}

samp {
 font-family: monospace;
 font-size: 10pt;
}

select {
 border-color: #FFF;
 border-style: inset;
 border-width: 2px;
 font-family: sans-serif;
 font-size: 10pt;
 zoom: 1;
}

small {
 font-size: 10pt;
}

strong {
 font-weight: bold;
}

sub {
 font-size: 10pt;
}

sup {
 font-size: 10pt;
}

table {
 border-color: #D4D0C8;
 display: block;
 zoom: 1;
}

tbody {
 border-color: #D4D0C8;
 display: block;
}

td {
 border-color: #D4D0C8;
 display: block;
 padding: 1px;
 zoom: 1;
}

textarea {
 background-color: #FFF;
 border-style: inset;
 border-width: 2px;
 font-family: monospace;
 font-size: 10pt;
 overflow-x: hidden;
 overflow-y: scroll;
 padding: 1px;
 white-space: pre;
 zoom: 1;
}

tfoot {
 border-color: #D4D0C8;
 display: block;
}

th {
 border-color: #D4D0C8;
 display: block;
 font-weight: bold;
 padding: 1px;
 text-align: center;
 zoom: 1;
}

thead {
 border-color: #D4D0C8;
 display: block;
}

tr {
 border-color: #D4D0C8;
 display: block;
 zoom: 1;
}

ul {
 display: block;
 list-style-image: none;
 list-style-position: outside;
 list-style-type: disc;
 margin: 14pt 0 14pt 30pt;
}

var {
 font-style: italic;
}