<!-- 把下列代码加到<body>区域中 -->
<style>
#sub1, #sub2, #sub3
{ position: absolute;
left: 480px;
visibility: hidden;
z-index: 3
}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
catnumber = 3
offset = 150
performOnchange = false
if (document.all) {
docObj = "document.all."
styleObj = ".style"
} else {
docObj = "document."
styleObj = ""
}
function openselect(subcat) {
popupselect = eval(docObj + subcat + styleObj)
popupselect.visibility = "visible"
}
function closeselect(submenu,subcat){
popupselect = eval(docObj + subcat + styleObj)
if (submenu.selectedIndex != 0) {
popupselect.visibility = "hidden"
numchoice = submenu.selectedIndex
choice = submenu[
numchoice].value
subcategory.value = choice
submenu.selectedIndex = 0
}
}
function lock() {
performOnchange = false
}
function unlock() {
performOnchange = true
}
function selectSub(cat) {
for (i=1; i <= catnumber; i++) {
subcat = "sub" + i
popupselect = eval(docObj + subcat + styleObj)
popupselect.visibility = "hidden"
}
if (performOnchange == true) {
letsopen = "sub" + cat.selectedIndex
if (letsopen == "sub0") {
alert("No category selected")
choice = "- subcategory -"
subcategory.value = choice
cat.focus()
} else {
openselect(letsopen)
lock()
}
}
}
// End -->
</script>
<div align="center">
<span id="sub1">
<select name="subannounce" onchange="closeselect(this,'sub1')">
<option selected value="">- 综合性站点 -
<option value="新浪网">新浪网
<option value="搜狐">搜狐
<option value="网易">网易
</select>
</span>
<span id="sub2">
<select name="subarts" onchange="closeselect(this,'sub2')">
<option selected value="">- 艺术性站点 -
<option value="chinamp3">chinamp3
<option value="通海微雕">通海微雕
<option value="painting">painting
</select>
</span>
<span id="sub3">
<select name="subsoftware" onchange="closeselect(this,'sub3')">
<option selected value="">- 体育类站点 -
<option value="中国足球网">中国足球网
<option value="中国篮球网">中国篮球网
<option value="NBA">NBA
<option value="新浪体育">新浪体育
</select>
</span>
<select name="categoria" onmouseover="unlock()" onchange="selectSub(this)">
<option selected value="">-- 选择站点类型 --
<option value="综合性站点">综合性站点
<option value="艺术性站点">艺术性站点
<option value="体育类站点">体育类站点
</select><br>
<input type="text" name="subcategory" readonly="readonly" value="- 选择具体站点 -">
</div>