function siguienteForm(id)
{
	
	var form=document.getElementById("form_top");
	var elems=form.getElementsByTagName("div");
	var ind=id;
	var ind2=id-1;
	
	if(id>=3)
	{
		ind=id+1;
		ind2=id;
	}
		
	elems[ind2].style.backgroundImage="url(img/circulo.jpg)";
	elems[ind2].className="form_elem";
	elems[ind].style.backgroundImage="url(img/circulo_activo.jpg)";
	elems[ind].className="form_elem_activo";
	
	if(id==2)
	{
		elems[id+1].style.backgroundImage="url(img/circulo_activo.jpg)";
		elems[id+1].className="form_elem_activo";
	}
	
	if(id==3)
	{
		elems[id-1].style.backgroundImage="url(img/circulo.jpg)";
		elems[id-1].className="form_elem";
	}
	
	document.getElementById('form'+id).style.display="none";
	id++;
	document.getElementById('form'+id).style.display="block";
	
}

function anteriorForm(id)
{
	
	var form=document.getElementById("form_top");
	var elems=form.getElementsByTagName("div");
	var ind=id-2;
	var ind2=id-1;
	
	if(id>=3)
	{
		ind=id-1;
		ind2=id;
	}
		
	elems[ind2].style.backgroundImage="url(img/circulo.jpg)";
	elems[ind2].className="form_elem";
	elems[ind].style.backgroundImage="url(img/circulo_activo.jpg)";
	elems[ind].className="form_elem_activo";
	
	if(id==4)
	{
		elems[id-2].style.backgroundImage="url(img/circulo_activo.jpg)";
		elems[id-2].className="form_elem_activo";
	}
	
	if(id==3)
	{
		elems[id-1].style.backgroundImage="url(img/circulo.jpg)";
		elems[id-1].className="form_elem";
		elems[id-2].style.backgroundImage="url(img/circulo_activo.jpg)";
		elems[id-2].className="form_elem_activo";
	}
	
	document.getElementById('form'+id).style.display="none";
	id--;
	document.getElementById('form'+id).style.display="block";
	
}

function comprobar(id, lang)
{
	var seguir=true;
	var valor;
	var input;
	
	if(id==1)
	{
		for (var i=1; i<=16; i++)
		{
			//saltar el decimo input
			if(i==10)
				continue;
			
			input=document.getElementById('form'+id+'_'+i);
			valor=input.value;
			if(valor.match(/^\s*$/))
			{
				seguir=false;
				input.style.border="1px solid #ff0000";
				setTimeout('reiniciarInput(\'form'+id+'_'+i+'\')',3000);
			}
		}
	}
	
	if(id==2)
	{
		/*for (var i=1; i<=24; i++)
		{
			//saltar inputs
			if(i==2 || i==7 || i==14 || i==21)
				continue;
			
			input=document.getElementById('form'+id+'_'+i);
			valor=input.value;
			if(valor.match(/^\s*$/))
			{
				seguir=false;
				input.style.border="1px solid #ff0000";
				setTimeout('reiniciarInput(\'form'+id+'_'+i+'\')',3000);
			}
		}*/
	}
	
	if(id==3)
	{
		/*for (var i=1; i<=10; i++)
		{
			//saltar el decimo input
			if(i==3 || i==8)
				continue;
			
			input=document.getElementById('form'+id+'_'+i);
			valor=input.value;
			if(valor.match(/^\s*$/))
			{
				seguir=false;
				input.style.border="1px solid #ff0000";
				setTimeout('reiniciarInput(\'form'+id+'_'+i+'\')',3000);
			}
		}*/
	}
	
	if(id==4)
	{		
		input=document.getElementById('form'+id+'_1');
		valor=input.value;
		if(valor.match(/^\s*$/))
		{
			seguir=false;
			input.style.border="1px solid #ff0000";
			setTimeout('reiniciarInput(\'form'+id+'_1\')',3000);
		}
	}
	
	if(id==5)
	{
		for (var i=1; i<=10; i++)
		{
			//saltar el cuarto input
			/*
			if(i==4)
				continue;
				*/
			
			input=document.getElementById('form'+id+'_'+i);
			valor=input.value;
			if(valor.match(/^\s*$/))
			{
				seguir=false;
				input.style.border="1px solid #ff0000";
				setTimeout('reiniciarInput(\'form'+id+'_'+i+'\')',3000);
			}
		}
	}
	
	if(seguir==true)
	{
		if(id==5)
			document.getElementById("formulario").submit();
		else
			siguienteForm(id);	
	}
	else
	{
		if(lang=='eu')
			alert("Datuak falta dira");
		else if(lang=='es')
			alert('Faltan datos');
		else
			alert('Il manque des données');
	}
}

function reiniciarInput(str)
{
	document.getElementById(str).style.border="1px solid #b2bdaa";
}