jQuery ui Autocomplete Events (select) check issue

Project encountered a demand:
when collecting area code, area code or digital input region name, display blur option, and the contents of the input for verification.
Using jQuery ui plug-solving, jQuery ui Download .
We encountered the following problem: when the trigger select event, call bootStrap check function does not take effect.
code show as below:

$(#areaCode).autocomplete({
	source:districtCode,
	minLength:2,
	select:function(event,ui){
		TaskDetail.validateAreaCode();
	}
})

    摸索过程中,发现调用之前加入alert就会生效。

$(#areaCode).autocomplete({
	source:districtCode,
	minLength:2,
	select:function(event,ui){
		alert(ui.item.value);
		TaskDetail.validateAreaCode();
	}
})

Search for something online, this article gives inspiration: solve js code added alert () on the successful execution, without the problem is not right .
The final code to read:

$(#areaCode).autocomplete({
	source:districtCode,
	minLength:2,
	select:function(event,ui){
		setTimeout(TaskDetail.validateAreaCode,100);
	}
})

To solve the verification problem.