一个下拉列表的值改变，刷新另一个下拉列表的值

<script type="text/javascript">
$(document).ready(function () {
$(".selectChange").change(function () {
$.ajax({
type: "POST",
url: "AJAXGetLineFromFactory",//后台函数，调用函数成功否在于地址对不对。可以试试加控制器url: "Home/AJAXGetLineFromFactory"，或者url: "../Home/AJAXGetLineFromFactory"
data: { factory: $(this).children("option:selected").val() },
dataType: "json",
success: function (data) {
$(".valueChange").empty();
if (data.length != 0) {
$.each(data,function (i,item) {
$("<option></option>")
.val(item)
.text(item.replace(item.substring(0,item.length -1),"Line "))
.appendTo($(".valueChange"));
});
}
}
});
});
});
</script>

页面标签如下：

<select name="factory" class="selectChange">
@foreach (var factorytemp in @ViewBag.allFactory) //ViewBag.allFactory是从后台传到前台的值集合
{
if (@ViewBag.factory == @factorytemp)
{
<option value=@factorytemp selected="selected">@factorytemp</option>
}
else
{
<option value=@factorytemp>@factorytemp</option>
}
}
</select>

<select name="line" class="valueChange">
@foreach (var linetemp in @ViewBag.allLineList)
{
if (@ViewBag.line == @linetemp)
{
<option value=@linetemp selected="selected">@linetemp</option>
}
else
{
<option value=@linetemp>@linetemp</option> } } </select>