function filtro(form)
{
	if	(form.nombre.value == "")
	{
        	alert("Enter your name");
        	form.nombre.focus();
    }
	else if	(form.email.value == "" || form.email.value.indexOf('@', 0) == -1 || form.email.value.indexOf('.', 0) == -1 || form.email.value.indexOf('iptotal.com') != -1)
	{
        	alert("Enter your name e-mail correctly");
        	form.email.focus();
    }
	else if	(form.empresa.value == "")
	{
        	alert("What company do you work for?");
        	form.empresa.focus();
    }
	else if	(form.comentario.value == "")
	{
        	alert("What can we do for you?");
        	form.comentario.focus();
    }
	else  
	{
		form.submit();	
		alert("Your request was send it, you will be contacted shortly.\n Thank you!");
		history.back();
	}
	/*else 
	{
		alert('debes aceptar los terminos de uso')
		form.terminos.focus()
	}*/
}