日期:2014-05-16  浏览次数:20385 次

ie6/7 层级出现问题 下拉框被遮住

<!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" />
<title>无标题文档</title>
<style type="text/css">
.zt{
float:left;
width:280px;
}
*{
margin:0;
padding:0;
}
body li dl dt{
margin:0;
padding:0;
}
img {
border:0;
}
body{
font-size: 12px;
    color: #000;
font-family: Arial, Helvetica, sans-serif;
}
li{ 
   list-style:none;
}
.fl{
float:left;
display:inline;
}
.fr{
float:right;
display:inline;
}
a{ 
   text-decoration:none;
   color:#000;
}
a:hover{ 
   text-decoration:none;
}
.search{
position:absolute;
top:0;
left:50%;
margin-left:-487px;
}
.search_wei_left{
width:280px;
height:360px;
float:left;
position:relative;
}
.search_wei_left .search_head{
width:280px;
float:left;
}
.search_wei_left .search_head li{
width:140px;
    height:40px;
    float:left;
    background:#6F828A;
    color:#FFF;
    font-size:18px;
font-weight:bold;
    line-height:40px;
    text-align:center;
    cursor:pointer;
}
.search_wei_left .search_head .active{
background:#FFF;
    filter:alpha(opacity:60);
    opacity:0.6;
    color:#00BCF3;
}
.search_wei_left .search_con{
width:280px;
    height:320px;
    float:left;
    background:#099;
display:block;
}
.search_xianshi{
position:absolute;
top:40px;
left:0;
width:280px;
height:320px;
}
.search_input1{
width:240px;
height:35px;
float:left;
border:1px solid #BFBFBF;
margin:20px 20px;
display:inline;
background:#FFF;
}
.search_input1_left{
width:218px;
height:35px;
float:left;
position:relative;
}
.search_input1_left .input1{
width:218px;
height:15px;
padding:10px 0;
border:0;
font-size:13px;
line-height:20px;
float:left;
outline:none;
color:#7D7D7D;
}
.search_input1_right{
width:22px;
height:35px;
float:right;
cursor:pointer;
}
.search_xiala1_zhen{
width:240px;
border:1px solid #B5B5B5;
float:left;
z-index:9999;
position:absolute;
left:-1px;
top:37px;
background:#FFF;
z-index:999;
}
.search_xiala1_zhen .close{
width:14px;
height:14px;
position:absolute;
top:5px;
right:10px;
cursor:pointer;
}
.search_xiala1_zhen .zhen_head{
width:238px;
height:30px;
line-height:27px;
text-indent:20px;
font-size:15px;
}
.search_xiala1_zhen .zhen_head a{
padding-left:20px;
}
.search_xia