使用jQuery实现dropdownlist的联动效果(sharepoint 2007)

function GetSubDropdown(parameterVal){
cascadeDropdownObj.empty();//对下级列表进行清空初始
cascadeDropdownObj.append("<option selected='selected'>(None)</option>");//添加一个(None)值
var camlQuery = "<Query xmlns='http://schemas.microsoft.com/sharepoint/soap/'> \
<Where> \
<Eq> \
<FieldRef Name='Title' /> \
<Value Type='Text'>"+parameterVal+"</Value> \
</Eq> \
</Where> \
</Query>";
$().SPServices({
operation: "GetListItems",
async: false,
listName: "CascadeSub",
CAMLQuery: camlQuery,
completefunc: function (xData, Status) {
$(xData.responseXML).find("[nodeName=z:row]").each(function() {
var subDropdownVal = $(this).attr("ows_SubDropdownVal");//获取字表对应的值
//binding subDropdown
cascadeDropdownObj.append("<option>"+subDropdownVal+"</option>");
});
}
});
}
//cascading 'Dropdown'
dropdownObj.change(function(){
var dropdownSelectTextObj = $("select[title$='Dropdown'] option:selected");//获取当前选中值
switch(dropdownSelectTextObj.text()){
case "L1":
GetSubDropdown("L1");
break;
case "L2":
GetSubDropdown("L2");
break;
case "PL1":
GetSubDropdown("PL1");
break;
default: //表示选中(None)值之后，对下级列表进行清空初始
cascadeDropdownObj.empty();
cascadeDropdownObj.append("<option selected='selected'>(None)</option>");
break;
}
});