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支持IE6 7 8,Firefox,Chrome,Opera,Safari 利用了一点float的小技巧
<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style type="text/css"> html,body{height:100%;margin:0;} body{padding:1px;} #mid-helper { float: left; height: 50%; margin-bottom: -120px; width: 10px; /*测试用,可删除*/ background-color: orange; /*测试用,可删除*/ } #mid { clear: both; height: 240px; background-color: #8fbc8f; /*测试用,可删除*/ opacity: .7; /*测试用,可删除*/ filter:alpha(opacity=70); /*测试用,可删除*/ } </style></head><body><div id="mid-helper"></div><div id="mid"> this is the #mid element</div></body></html>
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