css 笔记
第一种：常用的全局CSS属性设置 //参考大型网站，如凤凰网（1）清除所有的标记的内外边距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}（2）项目符号ul,ol,li{list-style:none;}（3）全局字体颜色设置body{font-size:12px;color:#444;}（4）常用标题的设置h1,h2,h3,h4,h5,h6{font-size:100%}h1{padding:11px 0 0; margin-bottom:4px;font:normal 20px/30px 黑体;text-align:center;}h2 { padding:6px 0 0; margin-bottom:4px; font:normal 20px/30px 黑体; text-align:center; }h3{font-size:12px}h4{font-size:12px;font-weight:normal}（5）全局链接a{text-decoration:none;cursor:pointer}a:link, a:visited {color:#004276}a:hover{text-decoration:underline;color:#ba2636}（6）图片img{border:none;} ie6 图片有边框，兼容性问题，要去边框（7）浮动和清除.float1{float:left;}.float2{float:right}.clear{clear:both;}.blank10{height:10px;clear:both;} 添加空白div 解决 div margin 上下边距会合并，兼容性问题（8）颜色.red{color:#FF0000;}.blue{color:#0000FF;}.green{color:#00ff00;}安装IETEST 测试 ie 6 （1）ie5网页居中 IE5下的居中，应该是：body{text-align:center} 加上这个，再在最大的div加{text-align:left;} Firefox下的居中，应该是：margin:0px auto; body{text-align:center;} .box{ margin:0 auto; text-align:left;} <body> <div class="box"> xx xx xx </div> </body> （2）单行内容垂直中齐 Div{height:80px;line-height:80px;} （3）IE中元素浮动时，margin左右加倍的问题 解决办法：Display:inline; margin:0 auto; ie6还是不行 问题被 （1）解决margin 左右边距在Ie6下会加倍，上下边距会合并，兼容性问题上下边距会合并，在中间加 div{height:10px;}.div1{width:200px;height:200px;background-color:#0000FF;margin:50px;float:left; display:inline;} //第一个div 的 display为行内样式 解决"margin 左右边距在Ie6下会加倍".div2{width:200px;height:200px;background-color:#0000FF;margin:50px;float:left;}<body><div class="div1"></div><div class="div2"></div> （4）实现1px高度的<div>在IE6下解决办法：overflow:hidden; //超出1px外的部分全部隐藏掉<div style="width:100px; height:1px; overflow:hidden;"></div> //超出的部分隐藏掉
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