jquery UI autocomplete当输入框焦点聚焦时自动弹出跟随下拉框

$("#search").autocomplete({

            minLength: 0,

            source: function(request,response){

                // request对象只有一个term属性，对应用户输入的文本

                // response是一个函数，在你自行处理并获取数据后，将JSON数据交给该函数处理，以便于autocomplete根据数据显示列表

                var dataObj = kwplan._getjsondata(request);

                response(dataObj);

            },

            focus :function () {

                 return false;

              },

             select: function(event, ui){

                 $this = $(this);

                // 这里的this指向当前输入框的DOM元素

                // event参数是事件对象

                // ui对象只有一个item属性，对应数据源中被选中的对象

                var event = event||window.event;

                this.value = ui.item.label;

                $("#teacherid").val(ui.item.category);

                // 必须阻止事件的默认行为，否则autocomplete默认会把ui.item.value设为输入框的value值

                event.preventDefault();

                setTimeout(function () {

                    $this.blur();

                   }, 1);

              }

    }).focus(function(){

                 $(this).autocomplete("search");

                 return false;

   }

);

<!doctype html>

<html lang="en">

<head>

    <meta charset="utf-8">

    <title>jQuery UI Autocomplete - Categories</title>

    <link rel="stylesheet" href="../../themes/base/jquery.ui.all.css">

    <script src="../../jquery-1.9.1.js"></script>

    <script src="../../ui/jquery.ui.core.js"></script>

    <script src="../../ui/jquery.ui.widget.js"></script>

    <script src="../../ui/jquery.ui.position.js"></script>

    <script src="../../ui/jquery.ui.menu.js"></script>

    <script src="../../ui/jquery.ui.autocomplete.js"></script>

    <link rel="stylesheet" href="../demos.css">

    <style>

    .ui-autocomplete-category {

        font-weight: bold;

        padding: .2em .4em;

        margin: .8em 0 .2em;

        line-height: 1.5;

    }

    </style>

    <script>

        var data = [

            { label: "anders", category: "" },

            { label: "andreas", category: "" },

            { label: "antal", category: "" },

            { label: "annhhx10", category: "Products" },

            { label: "annk K12", category: "Products" },

            { label: "annttop C13", category: "Products" },

            { label: "anders andersson", category: "People" },

            { label: "andreas andersson", category: "People" },

            { label: "andreas johnson", category: "People" }

        ];

function dynamicAutocomplete(){
            $("#search").autocomplete({
            minLength: 0,
            source: data,
                focus :function () {                     
                   return false;
                },
                select: function(event, ui){            
             $this = $(this);
            setTimeout(function () {               
                $this.blur();
               }, 1);
          }
            }).focus(function(){
                 $(this).autocomplete("search");
                 return false;
            }    
        );
    };

    </script>

</head>

<body>

<button onclick="dynamicAutocomplete()">autocomplete</button> <br />

<label for="search">Search: </label>

<input id="search">

<div class="demo-description">

<p>A categorized search result. Try typing "a" or "n".</p>

</div>

</body>

</html>

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jquery UI autocomplete当输入框焦点聚焦时自动弹出跟随下拉框

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