IE6/7下带有overflow:hidden属性的父级元素包不住带有position:relative属性的子元素
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .box{ width: 200px; height: 200px; border:10px solid black; overflow: hidden; } .content{ width: 400px; height: 400px; background: red; position: relative; } </style> </head> <body> <div class="box"> <div class="content"></div> </div> </body> </html>
显示效果如下:

解决方案:给父级也加上position:relative;属性
.box{
    width: 200px;
    height: 200px;
    border:10px solid black;
    overflow: hidden;
    *position: relative;
}
.content{
    width: 400px;
    height: 400px;
    background: red;
    position: relative;
}
兼容性—IE6/7下带有overflow:hidden属性的父级元素包不住带有position:relative属性的子元素
原文:http://www.cnblogs.com/halai/p/6853264.html