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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" />
<script src="jquery代码测试/jquery-1.7.2.min.js"></script>
<title>test</title>
<style type="text/css">
ul{
background:yellow;
overflow:auto;
margin:0;
padding:0;
max-height:240px;
width:300px;
}
li{
float:left;
list-style:none;
background:red;
height:100px;
}
#li1{
width:30px;
background:#000;
}
#li2{
width:270px;
background:blue;
height:250px;
max-height:240px;
}
</style>
</head>
<body>
<ul>
<li id="li1">1</li>
<li id="li2">1</li>
</ul>
<script type="text/javascript">
/*if($("ul").height()==240)
{
$("ul").width(230+17) // 内容溢出出现滚动条让层宽度增加上滚动条的宽度
}*/
</script>
</body>
</html>
<!--[if IE]>
<script type="text/javascript">
$("ul").width($("ul").width(317))
</script>
<![endif]-->
<!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" />
<script src="jquery代码测试/jquery-1.7.2.min.js"></script>
<title>test</title>
<style type="text/css">
ul{
background:yellow;
overflow:auto;
margin:0;
padding:0;
max-height:240px;
position:fixed;
}
li{
float:left;
list-style:none;
background:red;
height:100px;
}
#li1{
width:30px;
background:#000;
}
#li2{
width:270px;
background:blue;
height:250px;
}
</style>
</head>
<body>
<ul>
<li id="li1">1</li>
<li id="li2">1</li>
</ul>
<script type="text/javascript">
if($("ul").height()==240)
{
$("ul").width($("ul").width()+17)
}
</script>
</body>
</html>