按说这种 *** 作应该是后台程序来做，前端 *** 作的话有点窒息，主要是数据量。。亲测有效，望采纳！
<!doctype html><html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<link rel="stylesheet" type="text/css" href="CSS3/xuanxing.css" />
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.js"></script>
</head>
<body>
<style>
select{ width:75px font-size:12px color:#000000 font-family:'宋体' margin:auto 0px}
#select0{ background:yellow}
.select{ background:#85e785}
</style>
<script>
$(document).ready(function(e) {
$("select#select0").change(function(){
var cc = $(this).find("option:selected").attr("class")
$(this).siblings("select").find("option").hide()
$(this).siblings("select").find("option."+cc).show()
$(this).siblings("select").find("option."+cc+":first").attr("selected","selected")
})
$("select.select").change(function(){
var cid = $(this).find("option:selected").index()
$(this).siblings("select.select").each(function(){
$(this).find("option").eq(cid).attr("selected","selected")
})
})
})
</script>
<div style="width: 400px height: 20px margin:0 auto word-spacing: 0px">
<select id="select0">
<option class="op0">10mm</option>
<option class="op1">20mm</option>
<option class="op2">40mm</option>
</select>
<select class="select">
<option class="op0">8n</option>
<option class="op0">12n</option>
<option class="op0">16n</option>
<option class="op1">24n</option>
<option class="op1">28n</option>
<option class="op1">32n</option>
<option class="op2">40n</option>
<option class="op2">44n</option>
</select>
<select class="select">
<option class="op0">70mm</option>
<option class="op0">110mm</option>
<option class="op0">150mm</option>
<option class="op1">230mm</option>
<option class="op1">270mm</option>
<option class="op1">310mm</option>
<option class="op2">390mm</option>
<option class="op2">430mm</option>
</select>
<select class="select">
<option class="op0">128mm</option>
<option class="op0">190mm</option>
<option class="op0">230mm</option>
<option class="op1">310mm</option>
<option class="op1">350mm</option>
<option class="op1">390mm</option>
<option class="op2">470mm</option>
<option class="op2">510mm</option>
</select>
<select class="select">
<option class="op0">ESA0810</option>
<option class="op0">ESA1210</option>
<option class="op0">ESA1610</option>
<option class="op1">ESA2410</option>
<option class="op1">ESA2810</option>
<option class="op1">ESA3210</option>
<option class="op2">ESA4010</option>
<option class="op2">ESA4410</option>
</select>
</div>
</body>
</html>
<!---->
<style>.pad {position:absolutedisplay:nonez-index:100}
</style>
<table>
<tr>
<td onmouseover="ShowPopMenu(''pad1'')">pad1</td>
<td onmouseover="ShowPopMenu(''pad2'')">pad2</td>
<td onmouseover="ShowPopMenu(''pad3'')">pad2</td>
<td onmouseover="ShowPopMenu(''pad4'')">pad2</td>
<td onmouseover="ShowPopMenu(''pad5'')">pad2</td>
</tr>
</table>
<span id="pad1" class="pad">
<iframe src=w2.htm width=100 height=100 frameborder=no style="position:relative"></iframe>
</span>
<span id="pad2" class="pad">
<iframe src=w2.htm width=100 height=100 frameborder=no style="position:relative"></iframe>
</span>
<span id="pad3" class="pad">
<iframe src=w2.htm width=100 height=100 frameborder=no style="position:relative"></iframe>
</span>
<span id="pad4" class="pad">
<iframe src=w2.htm width=100 height=100 frameborder=no style="position:relative"></iframe>
</span>
<span id="pad5" class="pad">
<iframe src=about:blank name=popmenu2 width=100 height=100 frameborder=no style="position:relative"></iframe>
</span>
<div style="z-index:0">
<select>
<option>aaa
<option>bbb
<option>ccc
</select>
<br/>
<iframe src=></iframe>
<span id="view" style="position:absolutez-index:0"></span>
</div>
<script>
//function test(v) {
//v.innerHTML = "ssss<br/><iframe src=w2.htm width=200 height=100 style=\"position:relative\"></iframe>"
//}
popmenu2.document.write("aaaaaaa<br/>ssssssssss<br/>ccccccccc<br/>tttttttt")
function CloseAllPopMenu() {
var i = 1
while(document.all["pad"+i]) {
document.all["pad"+i].style.display = "none"
i++
}
}
function ShowPopMenu(v) {
var el = event.srcElement
v = document.all[v]
CloseAllPopMenu()
v.style.left = el.offsetLeft
v.style.display = "block"
}
</script>
是不是这样？
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