JQuery 弹出框 定位坐标

//页面代码   （简化）

<asp:TextBox ID="tbOperation2" runat="server" onclick="buttonclick($(this))"  CssClass="ui-button-icons-only" Text="按钮"></asp:TextBox>

<div id="editdialog" title="Basic dialog">
        <div>
            <label onclick="clickEdit();" class="labelbutton">
                Edit</label>
        </div>
        <div>
            <label onclick="clickView();" class="labelbutton">
                View</label>
        </div>
        <div>
            <label onclick="clickBuild();" class="labelbutton">
                Build</label>
        </div>
    </div>

<script type="text/javascript">  //页面初始化的时候
    var staticsignal;
    $(function() {
        // a workaround for a flaw in the demo system (http://dev.jqueryui.com/ticket/4375), ignore!
        $(":input.ui-button-icons-only").button();  //更改textbox的样式
    });

    </script>

<script type="text/javascript">

function buttonclick(e)
  {
      var offset=e.offset();//得到offset
      var x=offset.left;
      var y=offset.top;
   $("#editdialog").dialog({
            autoOpen:true,
            draggable:true,
            resizable:false,
            position:[x,y+35],  //设置坐标
            150
            });
            $(".ui-dialog-titlebar").hide();
            $('a.ui-dialog-titlebar-close').hide();
            staticsignal=e;
  }

    </script>