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css格式问题_html/css_WEB-ITnose

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Jun 21, 2016 am 09:20 AM

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">#class3{	width:900px;	margin-left:auto;	margin-right:auto;	position:relative;	background-color:#099;	margin-top:150px;	}#class3 ul{	width:800px;	height:30px;	background-color:#936;	margin-left:auto;	margin-right:auto;	position:relative;	}	#class3 li{	list-style-type: none;	width: 100px;	position:relative;	margin-top:10px;	float:left;	background-color:#3F0;	margin-right:10px;	text-align:center;	}	#class2{	width:900px;	margin-left:auto;	margin-right:auto;	position:relative;	background-color:#099;	height:50px;	}			#class2 li .01{	list-style-type: none;	position: absolute;	left: 670px;	top: 23px;}	.02{	list-style-type: none;	position: absolute;	left: 365px;	top: 30px;}.03{	list-style-type: none;	position: absolute;	left: 308px;	top: 30px;}.04{	list-style-type: none;	position: absolute;	left: -232px;	top: 30px;	}	.05{	list-style-type: none;	position: absolute;	left: 201px;	top: 30px;}.06{	list-style-type: none;	position: absolute;	left: 252px;	top: 30px;}.07{	list-style-type: none;	position: absolute;	left: -97px;	top: 28px;}</style></head><body><div id="class2"><ul><li class="01">横排</li><li class="02">横排</li><li class="03">横排</li><li class="04">横排</li><li class="05">横排</li><li class="06">横排</li><li class="07">横排</li></ul></div><div id="class3"><ul><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li></ul></div></body></html>

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.07{	list-style-type: none;	position: absolute;	left: -97px;	top: 28px;}

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IE8浏览器为什么设置了类中的位置会无效，还是原来那样

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">#box06 {    position:relative;    width: 500px;    height: 100px;  top:50%;  left:50%;  margin-left:-250px;  margin-top:-50px;    background-color:#F39;}  #box07 {    position:absolute;    width: 300px;    height: 30px;    background-color:#0F0;    left:50%;  top:50%;  margin-left:-150px;  margin-top:-15px;}  #box08 {    position:absolute;    width: 300px;    height: 30px;    background-color:#0Ff;    left:30px;  top:50%;}.nav{	width:500px;	background-color:#000;}.nav li{width:80px;float:left;list-style:none;display:inline;background:#0F0;text-align:center;margin-right:10px;}</style></head><body><div class="nav"><ul><li>横排</li><li>横排</li><li>横排</li></ul></div><div> DIV1 </div><div> DIV2 </div><div style= "display:inline "> DIV1 </div><div style= "display:inline "> DIV2 </div><span>DIVCSS!</span> <span>DIVCSS5 </span> <span style= "display:block "> SPAN1 </span><span style= "display:block "> SPAN2 </span><div id="box06">  <div id="box07">box07</div>  <div id="box08">box08</div></div></body></html>

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.nav{	width:500px;	background-color:#000;}

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2、为什么类nav的这个黑色背景色出不来？

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1class不要数字开头
2清除float

<div class="nav"><ul><li>横排</li><li>横排</li><li>横排</li> </ul>  <div style="clear:both;"></div></div>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">#class3{	width:900px;	margin-left:auto;	margin-right:auto;	position:relative;	background-color:#099;	margin-top:150px;	}#class3 ul{	width:800px;	height:30px;	background-color:#936;	margin-left:auto;	margin-right:auto;	position:relative;	}	#class3 li{	list-style-type: none;	width: 100px;	position:relative;	margin-top:10px;	float:left;	background-color:#3F0;	margin-right:10px;	text-align:center;	}	#class2{	width:100px;	margin-left:auto;	margin-right:auto;	position:relative;	background-color:#099;	height:50px;	}			#class2 .c01{	list-style-type: none;	position: absolute;	left: 422px;	top: 15px;	width: 60px;}	.c02{	list-style-type: none;	position: absolute;	left: 365px;	top: 15px;	width: 60px;}.c03{	list-style-type: none;	position: absolute;	left: 82px;	bottom: 0px;	right: 99px;	top: 15px;	height: 31px;	width: 58px;	top: 15px;}.c04{	list-style-type: none;	position: absolute;	left: -232px;	top: 30px;	top: 15px;	}	.c05{	list-style-type: none;	position: absolute;	left: 162px;	top: 15px;	width: 60px;	height: 32px;}.c06{	list-style-type: none;	position: absolute;	left: 252px;	top: 15px;	width: 60px;}.c07{	list-style-type: none;	position: absolute;	left: -97px;	top: 15px;	width: 60px;}</style></head><body><div id="class2"><ul><li class="c01">横1排</li><li class="c02">横2排</li><li class="c03">横3排</li><li class="c04">横4排</li><li class="c05">横5排</li><li class="c06">横6排</li><li class="c07">横7排</li></ul></div><div id="class3"><ul><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li><li>横排</li></ul></div></body></html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><style type="text/css">#box06 {    position:relative;    width: 500px;    height: 100px;  top:50%;  left:50%;  margin-left:-250px;  margin-top:-50px;    background-color:#F39;}  #box07 {    position:absolute;    width: 300px;    height: 30px;    background-color:#0F0;    left:50%;  top:50%;  margin-left:-150px;  margin-top:-15px;}  #box08 {    position:absolute;    width: 300px;    height: 30px;    background-color:#0Ff;    left:30px;  top:50%;}.nav{	width:500px;	background-color:#000;}.nav li{width:80px;float:left;list-style:none;display:inline;background:#0F0;text-align:center;margin-right:10px;}</style></head><body><div class="nav"><ul><li>横排</li><li>横排</li><li>横排</li></ul> <div style="clear:both;"></div></div><div> DIV1 </div><div> DIV2 </div><div style= "display:inline "> DIV1 </div><div style= "display:inline "> DIV2 </div><span>DIVCSS!</span> <span>DIVCSS5 </span> <span style= "display:block "> SPAN1 </span><span style= "display:block "> SPAN2 </span><div id="box06">  <div id="box07">box07</div>  <div id="box08">box08</div></div></body></html>

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