Javascript Return False 的重要性.

<asp:DataGrid>
<Columns>
<asp:TemplateColumn HeaderText="发单">
                                                <itemtemplate>
                                                    <asp:Button ID="btnFd" Runat="server" CssClass="Button60" Text="发单" CommandName="btnFd"></asp:Button>
                                                </itemtemplate>
                                                <headerstyle wrap="False" width="60px" />
                                                <itemstyle wrap="False" width="60px" />
                                            </asp:TemplateColumn>
<Columns>
</Datagrid>

以上是javascript 提示

private void dvList_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        {
            //发单按钮
            if(e.Item.ItemType == ListItemType.AlternatingItem
                || e.Item.ItemType == ListItemType.Item)
            {
                Button btnFd = (Button)e.Item.FindControl("btnFd");
                string id = ((DataRowView)e.Item.DataItem).Row["ID"].ToString();
                btnFd.Attributes["onclick"] = "return btnFd_onclick('"+id+"');";

                           }
        }

以上是后台代码

//发单按钮事件
            function btnFd_onclick(id)
            {
                var url = "PersonSelectFrame.aspx";
                var retval= window.showModalDialog(url,window,'DialogWidth:650px;DialogHeight:650px;Status:no;');
                if(retval != undefined && retval != null)
                {
                    document.getElementById("hnJsry").value = retval["id"];
                    document.getElementById("txJsry").value = retval["name"];
                    document.getElementById("hnDeleteId").value = id;
                    document.getElementById("hnBtn").click();
                }
                            }

这样的话在执行hnBtn的click事件后继续会返回服务器端,导致此hnBtn的click事件中的脚本不执行.
需要在btnFd_onclick(id)后添加一个 return false;//it is very impossible;  添加后这个才ok.