页面：

报废申请人：<asp:TextBox ID="txtPUSER" runat="server" Width="70px" CssClass="txt"></asp:TextBox>

                    <div style="display:none ;width:95px;z-index:1000;position:absolute;background-color:#33CCCC; height:200px;overflow:scroll;" id="DivApplyPerson">

                    </div> 

相应的js：

function getUserList() {

        var top = $('#txtPUSER').offset().top;

        top += 20;

        var left = $('#txtPUSER').offset().left;

        var name = $('#txtPUSER').val();

        var ksListAll = null;

        $.ajax({

            type: "post",

            async: false,

            dataType: 'json',

            url: '../Ajax/Locker.ashx',

            data: { active: "getUser", Name: escape(name) },

            success: function(json) {

                ksListAll = json.list;

            }

        });

        $('#DivApplyPerson').css("top", top);

        $('#DivApplyPerson').css("left", left);

        $('#DivApplyPerson').css("display", "block");

        var strHTML = "";

        if (ksListAll != null) {

            $.each(ksListAll, function(i, item) {

                strHTML = strHTML + "<a href='#' onclick='getVal(this)' value='" + item.DEPTID + "' style=' width:100px; float:left'>" + item.FULLNAME + "</a>"

            });

        }

        $("#DivApplyPerson").html(strHTML);

    }

    $('#txtPUSER').focus(function() {

        getUserList();

    }).keyup(function() {

        getUserList();

    });

    function getVal(a) {

        $("#txtPUSER").val(a.innerText);

        $('#DivApplyPerson').css("display", "none");

    }

    $("#txtPUSER").blur(function() {

        if (document.activeElement.parentElement != null) {

            if (document.activeElement.parentElement.id != "DivApplyPerson") {

                $('#DivApplyPerson').css("display", "none");

            }

        }

    });