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如何在 Javascript 中访问对象（和属性）数组？我的操作中有一组用户（对象属性：userID、fName、lName），并希望在自动完成标签中显示用户的 lName。我用jsp写了这段代码：

<div class="ui-widget">
    <label for="tags">Tag programming languages: </label>
    <input id="tags" size="50">
</div>
<s:hidden id="s" value="%{Users}"/>

并在这个 JSP 中编写 java 脚本代码：

    <script> 
    $(function() {          
        var values = document.getElementById('s').value;
        var availableTags = values.split(",");

        function split( val ) {
            return val.split( /,\s*/ );
        }
        function extractLast( term ) {
            return split( term ).pop();
        }

    $( "#tags" )
        // don't navigate away from the field on tab when selecting an item
        .bind( "keydown", function( event ) {
            if ( event.keyCode === $.ui.keyCode.TAB &&
                    $( this ).data( "ui-autocomplete" ).menu.active ) {
                event.preventDefault();
            }
        })
        .autocomplete({
            minLength: 0,
            source: function( request, response ) {
                // delegate back to autocomplete, but extract the last term
                response( $.ui.autocomplete.filter(
                    availableTags, extractLast( request.term ) ) );
            },
            focus: function() {
                // prevent value inserted on focus
                return false;
            },
            select: function( event, ui ) {
                var terms = split( this.value );
                // remove the current input
                terms.pop();
                // add the selected item
                terms.push( ui.item.value );
                // add placeholder to get the comma-and-space at the end
                terms.push( "" );
                this.value = terms.join( ", " );
                return false;
            }
        });
});
</script>

但是这段代码在自动完成中显示类名，像这样：Classes.User@ee662

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