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

function trim(str)
{
    return str.replace(/^\s+|\s+$/g,'');
}

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

    if (field_value == '' || field_value.length < field_size || trim(field_value) == '') {
      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;
    }
  }
}
//for amount fields
function check_amount(field_name_1, message_1){
	var uInput = form.elements[field_name_1].value;
	//var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	var alphaExp = /^[0-9\.]+$/;
	if(uInput.match(alphaExp)){
		error = false;
	}else{
		error = true;
		error_message = error_message + "* " + message_1 + "\n";
	}
}
//-----------------
//for check_special_char fields
function check_special_char(field_name_1, message_1){
	var uInput = form.elements[field_name_1].value;	
	var iChars = "!@#$%^&*()+=[]\\\';/{}|\":<>?";
	for (var i = 0; i < uInput.length; i++) {
		if (iChars.indexOf(uInput.charAt(i)) != -1) {
			error = true;
			error_message = error_message + "* " + message_1 + "\n";
		}
   }	
}
//-----------------
//for email validates
function check_email(field_name_1, message_1){
	var uInput = form.elements[field_name_1].value;
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(uInput.match(emailExp)){
		error = false;
	}else{
		error = true;
		error_message = error_message + "* " + message_1 + "\n";
	}
}

function check_input_email(field_name, field_size, message) {
  if (form.elements[field_name]) {
    var field_value = form.elements[field_name].value;

    if (field_value.indexOf("@")== -1 || field_value == '' || field_value.length < field_size || trim(field_value) == '' ) {
      error_message = error_message + "* " + message + "\n";
      error = true;
    }
  }
}

function check_input_num_validate(field_name, field_size, message) {
  if (form.elements[field_name]) {
    var field_value = form.elements[field_name].value;

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