//js代码 $(function () {        var availableTags = ["@qq.com", "@gmail.com", "@126.com", "@163.com", "@hotmail.com", "@yahoo.com", "@yahoo.com.cn", "@live.com", "@sohu.com", "@sina.com"];        var result = [];        $("#txtEmail").autocomplete({            source: function (request, response) {                for (var i = 0; i < availableTags.length; i++) {                    result.push(request.term + availableTags[i]);                }                response(result);                result = [];            }        });    });

<!--html代码：-->  <input id="txtEmail" type="text" placeholder="请输入您的邮箱！"  />