document.write('<form id="loginform" action="" method="post">用户名：<input type="text" name="username" id="username" maxlength="20">　密码：<input type="password" name="userpass" maxlength="20"> <input type="submit" name="btnlg" class="btn_lg" value="" onClick="dologin();return false;"> <input type="button" class="btn_rg" value="" onClick="location.href=\'/User/Reg.aspx\'"></form>');