按钮

前端按钮

<input type="button" id="btnPrelook" class="c6ui-button" runat="server" value="打印预览"
                        onclick="printOK('0');" />

function printOK(flag) {
  __doPostBack('btnPrint', '');
}

 protected void btnPrint_ServerClick(object sender, EventArgs e)
        {

        }