if (document.images) {
		
		image01on = new Image();
        image01on.src = "images/bto_11.gif";
		image02on = new Image();
        image02on.src = "images/bto_22.gif";
		image03on = new Image();
        image03on.src = "images/bto_33.gif";
		image04on = new Image();
        image04on.src = "images/bto_44.gif";
		image05on = new Image();
        image05on.src = "images/bto_55.gif";
		image06on = new Image();
        image06on.src = "images/bto_66.gif";
        	image07on = new Image();
        image07on.src = "images/bto_77.gif";		

		
		image01off = new Image();
        image01off.src = "images/bto_01.gif";
		image02off = new Image();
        image02off.src = "images/bto_02.gif";
		image03off = new Image();
        image03off.src = "images/bto_03.gif";
		image04off = new Image();
        image04off.src = "images/bto_04.gif";
		image05off = new Image();
        image05off.src = "images/bto_05.gif";
		image06off = new Image();
        image06off.src = "images/bto_06.gif";
        	image07off = new Image();
        image07off.src = "images/bto_07.gif";		
}

function imgOn(imgName) {
        if (document.images) {
                document[imgName].src = eval(imgName + "on.src");
        }
}
function imgOff(imgName) {
        if (document.images) {
                document[imgName].src = eval(imgName + "off.src");
        }
}

var form = "";
var submitted = false;
var error = false;
var error_message = "";

function check_input(field_name, field_size, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;

    if (field_value == '' || field_value.length < field_size) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_input_au(field_name, field_name_au, field_size, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;
    var field_value_au = form.elements[field_name_au].value;

    if (field_value_au != '' && field_value.length < field_size ) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}


function check_radio(field_name, message) {
  var isChecked = false;

  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var radio = form.elements[field_name];

    for (var i=0; i<radio.length; i++) {
      if (radio[i].checked == true) {
        isChecked = true;
        break;
      }
    }

    if (isChecked == false) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_select(field_name, field_default, message) {
  if (form.elements[field_name] && (form.elements[field_name].type != "hidden")) {
    var field_value = form.elements[field_name].value;

    if (field_value == field_default) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_password(field_name_1, field_name_2, field_size, message_1, message_2) {
  if (form.elements[field_name_1] && (form.elements[field_name_1].type != "hidden")) {
    var password = form.elements[field_name_1].value;
    var confirmation = form.elements[field_name_2].value;

    if (password == '' || password.length < field_size) {
      error_message = error_message + "* " + message_1 + "\n";
      error = true;
    } else if (password != confirmation) {
      error_message = error_message + "* " + message_2 + "\n";
      error = true;
    }
  }
}

function check_password_new(field_name_1, field_name_2, field_name_3, field_size, message_1, message_2, message_3) {
  if (form.elements[field_name_1] && (form.elements[field_name_1].type != "hidden")) {
    var password_current = form.elements[field_name_1].value;
    var password_new = form.elements[field_name_2].value;
    var password_confirmation = form.elements[field_name_3].value;

    if (password_current == '' || password_current.length < field_size) {
      error_message = error_message + "* " + message_1 + "\n";
      error = true;
    } else if (password_new == '' || password_new.length < field_size) {
      error_message = error_message + "* " + message_2 + "\n";
      error = true;
    } else if (password_new != password_confirmation) {
      error_message = error_message + "* " + message_3 + "\n";
      error = true;
    }
  }
}

function check_form(form_name) {
  if (submitted == true) {
    alert("Por favor verifique completar los campos.");
    return false;
  }

  error = false;
  form = form_name;
  error_message = "Por favor complete estos Datos:\n\n";

  check_input("nombres", 4, "El campo Nombres.");
  check_input("apellidos", 4, "El campo Apellidos.");
  check_input("nacionalidad", 6, "El campo Nacionalidad.");
  check_input("nrocedula", 6, "El campo Nro Cedula.");
  check_input("direccion", 6, "El campo Dirección.");
  check_input("localidad", 3, "El campo Localidad.");
    //check_input("telefono", 6, "El campo Telefono.");
  check_input("email", 6, "El campo E-mail.");
  check_input_au("cedula_autorizado","autorizado", 3, "El C.I.N° del Aut.");
  


  if (error == true) {
    alert(error_message);
    return false;
  } else {
    submitted = true;
    return true;
  }
}