代码:

<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
} body {
font-family: 宋体, Arial, Helvetica;
font-size: 12px;
color: rgb(51, 51, 51);
} button {
border: 0;
} .box_wrapper {
width: 300px;
height: 100%;
overflow: hidden;
background-color: #fff0c5;
border: 1px solid #cdbe93;
margin: 10px auto;
} .box {
padding: 10px 20px;
overflow: hidden;
} .public_sel {
position: relative;
float: left;
} .public_sel span {
height: 32px;
line-height: 32px;
border: 1px solid #cdbe93;
font-size: 14px;
padding-left: 5px;
display: block;
width: 91px;
color: #333;
background: #fae3a5 url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAJCAYAAAFxv/3CAAABPUlEQVR42mKwcQr8DwQMDNPXX2EwsHJlAAggBhCPiQEIAAIIzAKC/zy8Aj8BAohh5ZF3SiCBoNh8IyYOTl5TRkbG/6Z2HucYQaL6Fk6iP358ew0QQAynX0P0APEdILYHsWdvvsoANgyEpeRV74MEkwo7GZz94hgAAojBzNFvE0wShu09QvczFLcuegs1ygeI94PYOy9+Y4C7C4aFRMQZzr/4zwB2CVALswgj4x8hMalAQwuXDSCVLCBCmIHhb9fCwyZbV00/+/jhTQZGoBhAgDGdffu/E2oM0GCGemFxaU5kh0C9ALb7/p//ELu/ATErO+dfZDcgY3Ud09lVvSsYluy4ifD3EyAOSSrbjuJwUcn/lT2rGLzDsxj0zV0ZJOTUIZ5ABrO33lFN81G9BGRuZWZmCUnIa2N4++opXB4AWL2nlqvdbeUAAAAASUVORK5CYII=) no-repeat 95% center;
margin-left: -1px;
}
.public_sel .sel {
position: absolute;
top: 0;
left: 0;
height: 32px;
line-height: 32px;
display: block;
width: 100%;
opacity: 0;
filter: alpha(opacity=0);
} .btn {
background-color: #dc7d1f;
height: 34px;
line-height: 34px;
color: #fff0c5;
width: 60px;
text-align: center;
margin-left: 2px;
cursor: pointer;
}
</style>
</head> <body>
<div class="box_wrapper">
<div class="box">
<div class="public_sel J_public_sel">
<span>选择星座</span>
<select class="sel" name="xz1">
<option value="" selected="selected" style="display: none;">选择星座</option>
<option value="男羊座">男白羊座</option>
<option value="金牛座">男金牛座</option>
<option value="双子座">男双子座</option>
<option value="巨蟹座">男巨蟹座</option>
<option value="狮子座">男狮子座</option>
<option value="处女座">男处女座</option>
<option value="天秤座">男天秤座</option>
<option value="天蝎座">男天蝎座</option>
<option value="射手座">男射手座</option>
<option value="摩羯座">男摩羯座</option>
<option value="水瓶座">男水瓶座</option>
<option value="双鱼座">男双鱼座</option>
</select>
</div>
<div class="public_sel J_public_sel">
<span>女白羊座</span>
<select class="sel" name="xz2">
<option value="白羊座">女白羊座</option>
<option value="金牛座">女金牛座</option>
<option value="双子座">女双子座</option>
<option value="巨蟹座">女巨蟹座</option>
<option value="狮子座">女狮子座</option>
<option value="处女座">女处女座</option>
<option value="天秤座">女天秤座</option>
<option value="天蝎座">女天蝎座</option>
<option value="射手座">女射手座</option>
<option value="摩羯座">女摩羯座</option>
<option value="水瓶座">女水瓶座</option>
<option value="双鱼座">女双鱼座</option>
</select>
</div>
<button class="btn">配对</button>
</div>
<div class="box">
<div class="public_sel J_public_sel">
<span>男白羊座</span>
<select class="sel" name="xz1">
<option value="男羊座">男白羊座</option>
<option value="金牛座">男金牛座</option>
<option value="双子座">男双子座</option>
<option value="巨蟹座">男巨蟹座</option>
<option value="狮子座">男狮子座</option>
<option value="处女座">男处女座</option>
<option value="天秤座">男天秤座</option>
<option value="天蝎座">男天蝎座</option>
<option value="射手座">男射手座</option>
<option value="摩羯座">男摩羯座</option>
<option value="水瓶座">男水瓶座</option>
<option value="双鱼座">男双鱼座</option>
</select>
</div>
<div class="public_sel J_public_sel">
<span>女白羊座</span>
<select class="sel" name="xz2">
<option value="白羊座">女白羊座</option>
<option value="金牛座">女金牛座</option>
<option value="双子座">女双子座</option>
<option value="巨蟹座">女巨蟹座</option>
<option value="狮子座">女狮子座</option>
<option value="处女座">女处女座</option>
<option value="天秤座">女天秤座</option>
<option value="天蝎座">女天蝎座</option>
<option value="射手座">女射手座</option>
<option value="摩羯座">女摩羯座</option>
<option value="水瓶座">女水瓶座</option>
<option value="双鱼座">女双鱼座</option>
</select>
</div>
<button class="btn">配对</button>
</div>
</div>
<script src="http://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$(".J_public_sel select").change(function(){
var sel_txt = $(this).find("option:selected").text();
$(this).parent().children(".J_public_sel span").text(sel_txt);
})
})
</script>
</body> </html>

注意:当“选择星座”没有加这个样式<option value="" selected="selected" style="display: none;">选择星座</option>就好出现第一个选择不到

效果图: