6
我對編碼和CSS這個世界很陌生，這是我所做過的第一個要求我使用負值的頁面。我記得前些時候在某處讀過，最好不要使用負值。我不確定爲什麼，因爲我似乎無法再找到那篇文章。在CSS中使用負值是否可以接受？
我想感謝您對我的代碼中使用負值的反饋。我避免使用任何框架或類似的東西，以便我能夠理解CSS編碼的全部內容。
此外，我已經使用了一個內部樣式表，以便我可以快速修改我的代碼，而不是在兩個不同的文件之間交換。在開發真實世界頁面時，我肯定會考慮使用外部樣式表。其次，這是我第一次使用導入來使用重置樣式表。
CODE
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="Content-Language" content="en-us" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<meta name="author" content="" />
<title>Sample</title>
<link rel="icon" type="image/png" href="" />
<link rel="stylesheet" type="text/css" href="" />
<style type="text/css" media="all">
@import url('http://meyerweb.com/eric/tools/css/reset/reset.css');
body {
font-family: Georgia;
font-size: 1em;
}
#wrapper {
/* background-color: #FAEBD7; */
width: 960px;
margin: 0px auto;
}
#innerwrapper {
/* background-color: #CDC0B0; */
overflow: auto;
}
#header {
/* background-color: #8B8378; */
}
#logo {
background-color: #000000;
float: left;
width: 100px;
height: 70px;
color: #ffffff;
text-align: center;
padding-top: 30px;
}
#topnav {
/* background-color: #8B8970; */
float: right;
margin-top: 50px;
width: 300px;
text-align: right;
}
#status {
/* background-color: #808080; */
width: 100px;
position: relative;
top: -80px;
left: 800px;
text-align: center;
}
#topnav ul {
word-spacing: 5px;
}
#topnav ul li {
display: inline;
}
#separator {
border-bottom: 1px dashed gray;
margin-top: 20px;
}
#content {
/* background-color: #68838B; */
overflow: hidden;
margin-top: 60px;
}
#innercontent {
/* background-color: #778899; */
float: left;
width: 600px;
}
#rightcol {
/* background-color: #CDCDB4; */
float: right;
width: 300px;
}
#rightcol p + p {
margin-top: 1em;
}
#footer {
/* background-color: #CDB7B5; */
margin-top: 20px;
}
</style>
</head>
<body>
<div id="wrapper">
<div id="innerwrapper">
<div id="header">
<div id="logo">logo</div>
<div id="topnav">
<ul>
<li>about</li>
<li>browse</li>
<li>join</li>
<li>faq</li>
<li>contact</li>
</ul>
</div>
<div id="status">login</div>
</div>
</div>
<div id="separator"></div>
<div id="content">
<div id="innercontent">
Lorem ipsum dolor sit amet, at elementum neque vestibulum sollicitudin semper neque, vitae metus. Nibh ligula mi. Faucibus rutrum elit turpis, nec congue quam ipsum felis neque et, wisi amet, architecto eros congue. Maecenas suspendisse tellus arcu eget pharetra, rhoncus aenean sapien morbi nec arcu, vivamus aliquet lorem amet at, vestibulum purus sociis varius id. Imperdiet id magnis turpis beatae aliquet, vestibulum dolor nec eget eu cras lobortis, vel rerum, risus sed et, libero et non eros commodo. Taciti eu leo sollicitudin malesuada, nibh duis amet aenean, odio aptent ultrices. Tristique morbi nunc ullamcorper ut curabitur. Et a in ut sem varius, sem rutrum vehicula sem sed, at diam amet erat vel. Et sit in ante felis vitae sit.
Quam eget sed elit natoque velit, enim mauris mauris urna, integer amet tellus illo ipsum, dolor fermentum cursus enim mollis tristique porttitor. Non dignissim. Sit ligula leo tincidunt, justo ut ut placerat quisque non, risus nonummy. Ultrices mauris congue aliquam aliquam felis, at placerat, amet vestibulum dictumst pellentesque iaculis risus. Sem sed impedit nullam ultrices lorem aliquam, nulla tellus consequatur in ornare magna. Viverra amet pede in in ornare eu, id arcu. Justo mus suspendisse praesent et, amet mattis convallis ullamcorper felis, fermentum nibh at ac, ullamcorper ipsum auctor et maecenas, aliquam molestiae in qui. Massa elit suspendisse penatibus molestie libero dolor, non leo vitae, sollicitudin a, platea tristique iaculis, tortor augue non est. Ante rutrum quis pellentesque lacinia convallis non, vestibulum nibh nunc luctus nibh a, in amet, iaculis dui ornare pede laoreet eu. Cursus integer vehicula quis, justo eget purus mattis donec vestibulum nunc, nunc vel eros lectus.
</div>
<div id="rightcol">
<p>paragraph1</p>
<p>paragraph2</p>
</div>
</div>
<div id="footer">footer</div>
</div>
</body>
</html>
編輯 - 每WDM的建議更新代碼，只要正確使用
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="Content-Language" content="en-us" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<meta name="author" content="" />
<title>Sample</title>
<link rel="icon" type="image/png" href="" />
<link rel="stylesheet" type="text/css" href="" />
<style type="text/css" media="all">
@import url('http://meyerweb.com/eric/tools/css/reset/reset.css');
body {
font-family: Georgia;
font-size: 1em;
}
#wrapper {
/* background-color: #FAEBD7; */
width: 960px;
margin: 0px auto;
}
#innerwrapper {
/* background-color: #CDC0B0; */
overflow: auto;
}
#header {
/* background-color: #8B8378; */
}
#logo {
background-color: #000000;
float: left;
width: 100px;
height: 70px;
color: #ffffff;
text-align: center;
padding-top: 30px;
}
#status {
/* background-color: #808080; */
position: relative;
top: -85px;
left: 780px;
width: 100px;
text-align: center;
}
#topnav {
/* background-color: #8B8970; */
float: right;
width: 300px;
margin-top: -70px;
text-align: right;
}
#topnav ul {
word-spacing: 5px;
}
#topnav ul li {
display: inline;
}
#separator {
border-bottom: 1px dashed gray;
margin-top: 20px;
}
#content {
/* background-color: #68838B; */
overflow: hidden;
margin-top: 60px;
}
#innercontent {
/* background-color: #778899; */
float: left;
width: 600px;
}
#rightcol {
/* background-color: #CDCDB4; */
float: right;
width: 300px;
}
#rightcol p + p {
margin-top: 1em;
}
#footer {
/* background-color: #CDB7B5; */
margin-top: 20px;
}
</style>
</head>
<body>
<div id="wrapper">
<div id="innerwrapper">
<div id="header">
<div id="logo">logo</div>
<div id="status">Logged in</div>
<div id="topnav">
<ul>
<li>about</li>
<li>browse</li>
<li>join</li>
<li>faq</li>
<li>contact</li>
</ul>
</div>
</div>
</div>
<div id="separator"></div>
<div id="content">
<div id="innercontent">
Lorem ipsum dolor sit amet, at elementum neque vestibulum sollicitudin semper neque, vitae metus. Nibh ligula mi. Faucibus rutrum elit turpis, nec congue quam ipsum felis neque et, wisi amet, architecto eros congue. Maecenas suspendisse tellus arcu eget pharetra, rhoncus aenean sapien morbi nec arcu, vivamus aliquet lorem amet at, vestibulum purus sociis varius id. Imperdiet id magnis turpis beatae aliquet, vestibulum dolor nec eget eu cras lobortis, vel rerum, risus sed et, libero et non eros commodo. Taciti eu leo sollicitudin malesuada, nibh duis amet aenean, odio aptent ultrices. Tristique morbi nunc ullamcorper ut curabitur. Et a in ut sem varius, sem rutrum vehicula sem sed, at diam amet erat vel. Et sit in ante felis vitae sit.
Quam eget sed elit natoque velit, enim mauris mauris urna, integer amet tellus illo ipsum, dolor fermentum cursus enim mollis tristique porttitor. Non dignissim. Sit ligula leo tincidunt, justo ut ut placerat quisque non, risus nonummy. Ultrices mauris congue aliquam aliquam felis, at placerat, amet vestibulum dictumst pellentesque iaculis risus. Sem sed impedit nullam ultrices lorem aliquam, nulla tellus consequatur in ornare magna. Viverra amet pede in in ornare eu, id arcu. Justo mus suspendisse praesent et, amet mattis convallis ullamcorper felis, fermentum nibh at ac, ullamcorper ipsum auctor et maecenas, aliquam molestiae in qui. Massa elit suspendisse penatibus molestie libero dolor, non leo vitae, sollicitudin a, platea tristique iaculis, tortor augue non est. Ante rutrum quis pellentesque lacinia convallis non, vestibulum nibh nunc luctus nibh a, in amet, iaculis dui ornare pede laoreet eu. Cursus integer vehicula quis, justo eget purus mattis donec vestibulum nunc, nunc vel eros lectus.
</div>
<div id="rightcol">
<p>paragraph 1</p>
<p>paragraph 2</p>
</div>
</div>
<div id="footer">footer</div>
</div>
</body>
</html>
負值是完全可以接受的，但我會謹慎使用它們。它們在某些情況下非常有用。 – wdm 2011-05-26 05:58:48
@wdm - 他們有什麼用處？我的負值使用是否可以接受？ – PeanutsMonkey 2011-05-26 08:45:04
http://stackoverflow.com/questions/1623163/is-negative-margin-or-padding-invalid-css-according-to-w3c可能的重複？ – 2011-05-26 05:53:05