function swap(obj)
    {
      var o = document.getElementById(obj);
      o.className= (o.className=='hide') ? 'show' : 'hide';
    }


<!--
/*
function validate1 (form) {
 
   // VARIABLES
 r=0;
 t=0;
 n=0;
 cadena="";
 
 
   // TEST DE CAMPOS
 if (form.organisation.value=="" && form.otro_dato.value=="")
    { r=1; cadena+="    * Universidad/Empresa\n";form.organisation.focus()};
 if (form.name.value=="")
    { r=1;cadena+="    * Nombre\n";form.name.focus()};
 if (form.firstname.value=="")
    { r=1;cadena+="    * Apellidos\n";form.firstname.focus()};
 if (form.addr1.value=="")
    { r=1;cadena+="    * Dirección\n";form.addr1.focus()};
 if (form.zip.value=="")
     r=1;cadena+="    * Código Postal\n";form.zip.focus()};
 else if(!form.zip.value.matches("[0-9]*"))
	{ r=1;n=1;cadena+="    * Código Postal\n";form.zip.focus()};

 if (form.city.value=="")
    {r=1;cadena+="    * Ciudad\n";form.city.focus()};
 else if(!form.city.value.matches("[a-zA-ZñÑáéíóúÁÉÍÓÚ ]*"))
	{r=1;t=1;cadena+="    * Código Postal\n";form.city.focus()};

 if (form.state.value=="")
     {r=1;cadena+="    * Provincia\n";form.state.focus()};
 else if(!form.state.value.matches("[a-zA-ZñÑáéíóúÁÉÍÓÚ ]*"))
     {r=1;t=1;cadena+="    * Código Postal\n";form.state.focus()};

 if (form.email.value.indexOf('@',0)==-1)
    {r=1;cadena+="    * E-Mail\n\n";form.email.focus()};

	if(t==1)
		cadena+="¡Los campos de texto no pueden contener números!\n";
	if(n==1)
		cadena+="¡Los campos numéricos no pueden contener letras!\n";
   // RETORNAR AL ENVÍO
 if (r==1) { 
 	alert("Por favor, introduce correctamente los siguientes campos obligatorios:\n\n"+cadena); 
	return false; }
 else { return true; }
 } 




*/
 

// OK - Si socio CEA
function sociocea(form)
{ 
 	form.cena.disabled = true;
 	form.socio.disabled = true;
	form.socio.checked = true;
	form.cena.checked = true;

	//opt1.style.color='#bbbbbb';
	//opt2.style.color='#bbbbbb';
	//opt5.style.color='#ffffff';
	
}


// OK - Si no socio CEA

function nosocio(form)
{ 
 	form.cena.disabled = true;
 	form.socio.disabled = true;
	
	form.socio.checked = false;
	form.cena.checked = true;

	//opt1.style.color='#bbbbbb';
	//opt2.style.color='#bbbbbb';
	//opt5.style.color='#ffffff';
	
}

function estudiante(form)
{ 
 	form.cena.disabled = false;
 	form.socio.disabled = false;
	form.socio.checked = false;
	form.cena.checked = false;	
	//opt1.style.color='';
	//opt2.style.color='';
	//opt5.style.color='#999999';
}




// OK - Seleccion de número de acompañantes 
function actualiza1(form)
{ 
 	if( form.hay_acompañantes.checked)
	{	
		form.numero_acompañantes.disabled = false;
		form.acomp_visita_nijar.disabled=false;
		form.acomp_visita_tren.disabled=false;
		form.acomp_cena_gala.disabled=false;
		form.acomp_visita_turistica.disabled=false;
		form.acomp_visita_monumental.disabled=false;
		form.acomp_visita_parque.disabled=false;
		//opt3.style.color='';
	}
	else	
	{	
		//opt3.style.color='#bbbbbb';
 		form.numero_acompañantes.value = 0;
 		form.numero_acompañantes.disabled = true;
		form.acomp_visita_nijar.disabled=true;
		form.acomp_visita_tren.disabled=true;
		form.acomp_cena_gala.disabled=true;
		form.acomp_visita_turistica.disabled=true;
		form.acomp_visita_monumental.disabled=true;
		form.acomp_visita_parque.disabled=true;
	}
}
 


// OK - Seleccion de acompañantes del programa de OCIO
function actualiza2(form)
{ 
	if( form.ocio_acompañantes.checked)
	{
	 	form.numero_programa_ocio.disabled = false;
		//opt4.style.color='';
	}
	else
	{	
		//opt4.style.color='#bbbbbb';
 		form.numero_programa_ocio.value = 0;
 		form.numero_programa_ocio.disabled = true;
	}

}



// OK - Selección de "Otra institución"
function actualiza3(form)
{ 
	if( form.otro.checked)
	{
		form.organisation.value = '';
	 	form.other_organisation.disabled = false;
 		form.organisation.disabled = true;
	}
	else
	{	
 		form.other_organisation.value = '';
 		form.other_organisation.disabled = true;
 		form.organisation.disabled = false;
	}

}


// -->