// JavaScript Document
function validaSesion(f)
{
	var user = document.getElementById('user');
	var pass = document.getElementById('pass');
	var erUser = document.getElementById('er_user');
	var erPass = document.getElementById('er_pass');
	var erMens = document.getElementById('er_mens');
	erUser.style.display = "none";
	erPass.style.display = "none";
	erMens.style.display = "none";
	res = true;
	
	if(user.value==null || vacio(user.value))
	{
		erUser.style.display = "inline";
		erMens.style.display = "inline";
		res = false;
	}
	if(pass.value==null ||vacio(pass.value))
	{
		erPass.style.display = "inline";
		erMens.style.display = "inline";			
		res = false;
	}	
	return res;	
}

function validaCorreo(f)
{
	document.getElementById('myError').style.display = "none";

	var nombre = f.nombre.value;
	var correo = f.correo.value;
	var pais = f.pais.value;
	var comentario = f.comentario.value;
	res = true;
	
	if(nombre==null ||vacio(nombre))
	{
		document.getElementById('myError').style.display = "inline";		
		res = false;		
	}
	if(correo==null || vacio(correo))
	{
		document.getElementById('myError').style.display = "inline";		
		res = false;		
	}
	if(pais==null ||vacio(pais))
	{
		document.getElementById('myError').style.display = "inline";			
		res = false;		
	}
	if(comentario==null || vacio(comentario))
	{
		document.getElementById('myError').style.display = "inline";		
		res = false;		
	}
		
	return res;	
}

function vacio(q)
{  
	 for ( i = 0; i < q.length; i++ ) 
	 {  
		 if ( q.charAt(i) != " " )
			 return false;  
	 }  
	 return true;  
}  

//para q asigne el nombre d los input
var num = 8; 
function insertaFila()
{
num++;	

var x=document.getElementById('myTable').insertRow(num+2);
var y=x.insertCell(0);
var z=x.insertCell(1);
var w=x.insertCell(2);

y.innerHTML="<input type=text id='prod"+num+"' name='prod"+num+"'>";
z.innerHTML="<input type=text id='cant"+num+"' name='cant"+num+"' size=2>";
w.innerHTML="<select id='pres"+num+"' name='pres"+num+"' class='select'><option value=cuarto>Cuarto</option><option value=galon>Gal&oacute;n</option><option value=cubeta>Cubeta</option></select>";

}