// form validation function //
function validate(form) {
  var valida = form.valida.value;
  var nombre = form.nombre.value;
  var email = form.email.value;
  var verifi = form.verifi.value;
  var leido = document.getElementById("leido");
// Valida Nombre
  if(nombre == "") {
    inlineMsg('nombre','Debe teclear su nombre y apellidos.',2);
    return false;
  }
  if(nombre==null || nombre.length==0 || /^\s+$/.test(nombre)) {
    inlineMsg('nombre','El nombre tecleado es incorrecto.',2);
    return false;
  }
// Valida Email
  if(email == "") {
    inlineMsg('email','Debe teclear una dirección de correo electrónico.',2);
    return false;
  }
  var filtro=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
  if(!filtro.test(email)) {
    inlineMsg('email','El email tecleado es incorrecto.',2);
    return false;
  }
// Valida codigo
  if(verifi == "") {
    inlineMsg('verifi','Debe teclear el código de validación.',2);
    return false;
  }
  if(verifi != valida) {
    inlineMsg('verifi','El código de validación tecleado es incorrecto.',2);
    return false;
  }
// Si todo correcto
  return true;
}

// START OF MESSAGE SCRIPT //

var MSGTIMER = 20;
var MSGSPEED = 5;
var MSGOFFSET = 3;
var MSGHIDE = 3;

// build out the divs, set attributes and call the fade function //
function inlineMsg(target,string,autohide) {
  var msg;
  var msgcontent;
  if(!document.getElementById('msg')) {
    msg = document.createElement('div');
    msg.id = 'msg';
    msgcontent = document.createElement('div');
    msgcontent.id = 'msgcontent';
    document.body.appendChild(msg);
    msg.appendChild(msgcontent);
    msg.style.filter = 'alpha(opacity=0)';
    msg.style.opacity = 0;
    msg.alpha = 0;
  } else {
    msg = document.getElementById('msg');
    msgcontent = document.getElementById('msgcontent');
  }
  msgcontent.innerHTML = string;
  msg.style.display = 'block';
  var msgheight = msg.offsetHeight;
  var targetdiv = document.getElementById(target);
  targetdiv.focus();
  var targetheight = targetdiv.offsetHeight;
  var targetwidth = targetdiv.offsetWidth;
  var topposition = topPosition(targetdiv) - ((msgheight - targetheight) / 2);
  var leftposition = leftPosition(targetdiv) + targetwidth + MSGOFFSET;
  msg.style.top = topposition + 'px';
  msg.style.left = leftposition + 'px';
  clearInterval(msg.timer);
  msg.timer = setInterval("fadeMsg(1)", MSGTIMER);
  if(!autohide) {
    autohide = MSGHIDE;  
  }
  window.setTimeout("hideMsg()", (autohide * 1000));
}

// hide the form alert //
function hideMsg(msg) {
  var msg = document.getElementById('msg');
  if(!msg.timer) {
    msg.timer = setInterval("fadeMsg(0)", MSGTIMER);
  }
}

// face the message box //
function fadeMsg(flag) {
  if(flag == null) {
    flag = 1;
  }
  var msg = document.getElementById('msg');
  var value;
  if(flag == 1) {
    value = msg.alpha + MSGSPEED;
  } else {
    value = msg.alpha - MSGSPEED;
  }
  msg.alpha = value;
  msg.style.opacity = (value / 100);
  msg.style.filter = 'alpha(opacity=' + value + ')';
  if(value >= 99) {
    clearInterval(msg.timer);
    msg.timer = null;
  } else if(value <= 1) {
    msg.style.display = "none";
    clearInterval(msg.timer);
  }
}

// calculate the position of the element in relation to the left of the browser //
function leftPosition(target) {
  var left = 0;
  if(target.offsetParent) {
    while(1) {
      left += target.offsetLeft;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.x) {
    left += target.x;
  }
  return left;
}

// calculate the position of the element in relation to the top of the browser window //
function topPosition(target) {
  var top = 0;
  if(target.offsetParent) {
    while(1) {
      top += target.offsetTop;
      if(!target.offsetParent) {
        break;
      }
      target = target.offsetParent;
    }
  } else if(target.y) {
    top += target.y;
  }
  return top;
}

// preload the arrow //
if(document.images) {
  arrow = new Image(7,80); 
  arrow.src = "../img/msg_arrow.gif"; 
}

//Retorna: 1 = NIF ok, 2 = CIF ok, 3 = NIE ok, -1 = NIF error, -2 = CIF error, -3 = NIE error, 0 = ??? error
function valida_nif_cif_nie(a) {
  var temp=a.toUpperCase();
  var cadenadni="TRWAGMYFPDXBNJZSQVHLCKE";
  if (temp!==''){
//si no tiene un formato valido devuelve error
    if ((!/^[A-Z]{1}[0-9]{7}[A-Z0-9]{1}$/.test(temp) && !/^[T]{1}[A-Z0-9]{8}$/.test(temp)) && !/^[0-9]{8}[A-Z]{1}$/.test(temp)) {
      return 0;
    }
//comprobacion de NIFs estandar
    if (/^[0-9]{8}[A-Z]{1}$/.test(temp)) {
      posicion = a.substring(8,0) % 23;
      letra = cadenadni.charAt(posicion);
      var letradni=temp.charAt(8);
      if (letra == letradni) {
	return 1;
      } else {
	return -1;
      }
    }
//algoritmo para comprobacion de codigos tipo CIF
    suma = parseInt(a[2])+parseInt(a[4])+parseInt(a[6]);
    for (i = 1; i < 8; i += 2) {
      temp1 = 2 * parseInt(a[i]);
      temp1 += '';
      temp1 = temp1.substring(0,1);
      temp2 = 2 * parseInt(a[i]);
      temp2 += '';
      temp2 = temp2.substring(1,2);
      if (temp2 == '') {
	temp2 = '0';
      }
      suma += (parseInt(temp1) + parseInt(temp2));
    }
    suma += '';
    n = 10 - parseInt(suma.substring(suma.length-1, suma.length));
//comprobacion de NIFs especiales (se calculan como CIFs)
    if (/^[KLM]{1}/.test(temp)) {
      if (a[8] == String.fromCharCode(64 + n)) {
	return 1;
      } else {
	return -1;
      }
    }
//comprobacion de CIFs
    if (/^[ABCDEFGHJNPQRSUVW]{1}/.test(temp)) {
      temp = n + '';
      if (a[8] == String.fromCharCode(64 + n) || a[8] == parseInt(temp.substring(temp.length-1, temp.length))) {
	return 2;
      } else {
	return -2;
      }
    }
//comprobacion de NIEs
//T
    if (/^[T]{1}/.test(temp)) {
      if (a[8] == /^[T]{1}[A-Z0-9]{8}$/.test(temp)) {
	return 3;
      } else {
	return -3;
      }
    }
//XYZ
    if (/^[XYZ]{1}/.test(temp)) {
      pos = str_replace(['X', 'Y', 'Z'], ['0','1','2'], temp).substring(0, 8) % 23;
      if (a[8] == cadenadni.substring(pos, pos + 1)) {
	return 3;
      } else {
	return -3;
      }
    }
  }
  return 0;
}
function str_replace(search, replace, subject) {
    // *     ejemplo 1: str_replace(' ', '.', 'Kevin van Zonneveld');
    // *     retorna 1: 'Kevin.van.Zonneveld'
    // *     ejemplo 2: str_replace(['{name}', 'l'], ['hello', 'm'], '{name}, lars');
    // *     retorna 2: 'hemmo, mars'
  var f = search, r = replace, s = subject;
  var ra = r instanceof Array, sa = s instanceof Array, f = [].concat(f), r = [].concat(r), i = (s = [].concat(s)).length;
  while (j = 0, i--) {
    if (s[i]) {
      while (s[i] = s[i].split(f[j]).join(ra ? r[j] || "" : r[0]), ++j in f){};
    }
  }
  return sa ? s : s[0];
}