关于用div布局求助！！！！！！！！！！！！！！！！！！
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>个人消费管理系统</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<style type="text/css">
body{
margin: 0px;
padding: 0px;
background-image: url("./Images/background.png");
}
div{
border: 3px solid black;
}
.div_logo{
margin-top:2px;
width: 100%;
}
.div_dh{
margin-top: 2px;
}
#div_buttom div_left_dh,div_iframe{
float: left;
width: 100%;
}
.div_left_dh{
/* margin-right:90%; */
width:120px;
text-align: center;
height: 100%;
padding-top: 2%;
}
.div_addxf{
margin-bottom: 20%;
}
.div_xfgl{
margin-bottom: 20%;
}
.div_lxwm{
margin-bottom:20%;
}
#div_iframe{
margin-left: 130px;
width: 100%;
padding: 0px;
}
span{
border: 1px solid red;
}
.span_logo{
border: 0px solid; red;
text-align:center;
margin-left: 40%;
}
.span_logoname{
border: 0px solid; red;
text-align:center;
margin-left: 40%;
color: red;
font-size:25px;
}
.span_xt,.span_grzl,.span_grzl,.span_gy,.span_bz{
margin-left: 15%;
}
.span_iframe{
padding: 0px;
width: 100%;
}
</style>
</head>
<body>
<div class="body">
<form action="?" method="post">
<div class="div_logo">
<span class="span_logo"><img src="./Images/logo.png"></span>
<div class="div_logname">
<span class="span_logoname">个人消费管理系统</span>
</div>
</div>
<div class="div_dh">
<span class="span_grzl">个人昵称（点击可以查看个人信息）</span>
<span class="span_xt">系统设置</span>
<span class="span_bz">帮助?</span>
<span alt="关于用div布局！" /> div布局 HTML
[解决办法]
div是块级无素，每个div默认情况下都是会占一行的，所以你那样是不行的。可以参考http://www.w3school.com.cn/css/css_positioning_floating.asp
[解决办法]
你应该用几个大的div当作iframe布局,然后小div在大div你用float来排列,例如左右结构,就是两个大div,宽度2:8;就像iframe那样就可以了
[解决办法]
可以用css float浮动设置
