Marcar varios checkbox simultaneamente

[jorge_nieves]

Con otra funcion de javascript que creo que es mas sencilla tampoco me hace nada.....

Código HTML:

<script >
		function grupo(cual, estado) {
			if (cual=='todos1') {
			document['forms']['permisos']['sel1']['disabled'] = estado;
			document['forms']['permisos']['sel2']['disabled'] = estado;
			}
		}
		</script >		
		
		<form name='permisos' action="?act=3" method="post">
		<table border="1" width="100%">
			<TR>
				<TD>Nombre:</TD><td><input type='text' name='nombre' size="100%" maxlength="15"></td>
			</TR>
			<TR>
				<TD>Descripcion:</TD><td><input type='text' name='descripcion' size="100%" maxlength="70"></td>
			</TR>
			<tr>
				<TD colspan="2">Asignar Permisos:
					<table border="1" width="50%">

						<TR>
							<td><INPUT type='checkbox' onkeyup=grupo(todos1,this.value=='')>AREA INFORMACION</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel1' disabled>Noticias</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel2' >Agenda</TD>
						</TR>
						<TR>
							<TD><INPUT type='checkbox' name='todos2'>FORO</TD>
						</TR>
						<TR>
							<TD><INPUT type='checkbox' name='todos3' onclick=marcar(this.parentNode,this)>AREA COLEGIADO</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel3'>Revista Prensa</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel4'>Listas de correo</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel5'>Consultar BD</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel6'>Gestor de correo</TD>
						</TR>
						<TR>
							<TD><INPUT type='checkbox' name='todos4'>MISCEL&Aacute;NEA</TD>
						</TR>
						<TR>
							<TD><INPUT type='checkbox' name='todos5'>GESTIONAR BD</TD>
						</TR>
						<TR>
							<TD><INPUT type='checkbox' name='todos6' onclick="marcar(this.parentNode,this)">GESTIONAR CONTENIDOS</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel8'>Gestionar Noticias</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel9'>Gestionar Eventos</TD>
						</TR>
						<TR>
							<TD>&nbsp;&nbsp;<INPUT type='checkbox' name='sel10'>Gestionar Perfiles</TD>
						</TR>



					</table>
				</TD>
			</tr>
			<TR>
				<TD>&nbsp;&nbsp;<INPUT type='submit' name='enviar' value="Enviar"></TD>
			</TR>
			

		</table></form>