CRM 2016 自定义lookup过滤

function preFilterLookup() {
//终端业态
Xrm.Page.getControl("new_typeofoperationid").addPreSearch(function () {
addLookupFilter();
});
}
function addLookupFilter() {
var customertypecode = Xrm.Page.getAttribute("customertypecode").getValue(); //客户类型
if (customertypecode != null) {
fetchXml = "<filter type='and'><condition attribute='new_customertypecode' operator='eq' value='" + customertypecode + "' /></filter>";
Xrm.Page.getControl("new_typeofoperationid").addCustomFilter(fetchXml);
}
}