自动建议无法预览，但得到结果

I am doing a login/logout page. I face a problem with auto suggest. If without the code below, the auto suggest is working with list. But if i add on the code below, the auto suggest not working mean i can't get the suggestion list. I have do some test, although can't get the list, the result will still appear. I am doing a login/logout page. I face a proble