/*******************************************************************************
 *Validator class
 *requires form elements to be passed (error div, must have validation class)
 *runs utitly functions based on the elements passed, matches validation with class
 *returns true or false
 */
var Validator = Class.create();
Validator.prototype =
{
  initialize: function(form_elements){
    this.current_error_id = "";
    this.validations      = "";
    this.form_elements    = form_elements;
  },
  isFormValid : function(){
    this.validations = this.form_elements.collect(function(element){
      this.current_error_id = element.id;
      var is_valid = true;
      if(/(required)/i.test(element.className)){
        is_valid = (isNotEmptyInput(this.current_error_id));
      }
      if(/(validate-alpha)/i.test(element.className)){
        is_valid = (isValidRequiredAlphaInput(this.current_error_id));
      }
      if(/(validate-email)/i.test(element.className)){
        is_valid = (isValidEmail(this.current_error_id));
      }
      if(/(validate-selected)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = isValidSelection(this.current_error_id, error_msg);
      }
      if(/(validate-state)/i.test(element.className)){
        is_valid = (isValidUsState(this.current_error_id));
      }
      if(/(validate-zip)/i.test(element.className)){
        is_valid = (isValidZip(this.current_error_id));
      }
      if(/(validate-phone)/i.test(element.className)){
        is_valid = (isValidPhone(this.current_error_id));
      }
      if(/(validate-privacy)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = (isCheckedBox(this.current_error_id, error_msg, "privacy_policy"));
      }
      if(/(validate-dob)/i.test(element.className)){
        is_valid = (isValidDob(this.current_error_id));
        (is_valid) ? fadeOut(this.current_error_id) : "";
      }
      if(/(validate-child-dob)/i.test(element.className)){
        is_valid = (isValidChildDob(this.current_error_id));
        (is_valid) ? fadeOut(this.current_error_id) : "";
      }
      if(/(validate-request-date)/i.test(element.className)){
        is_valid = (isValidCoverage(this.current_error_id));
        (is_valid) ? fadeOut(this.current_error_id) : "";
      }
      if(/(validate-height)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = (isValidHeight(this.current_error_id, error_msg));
      }
      if(/(validate-number)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = (isValidRequiredNumberInput(this.current_error_id, error_msg));
      }
      if(/(validate-weight)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = (isValidWeight(this.current_error_id, error_msg));
      }
      if(/(validate-one-selected)/i.test(element.className)){
        var error_msg = (trim(element.innerHTML) == "") ? undefined : element.innerHTML;
        is_valid = (isOneSelected(this.current_error_id, error_msg));
      }
      if(/(validate-city-state-zip)/i.test(element.className)){
        is_valid = (isValidCityStateZip(this.current_error_id));
      }
      return is_valid;
    });
    return this.validations.all(function(v){ return (v == true); });
  }
}
  function reformatPhone(id) {
    var phone          = $F(id);
    var clean_phone    = phone.gsub(/\D/, "");
    var phone_area     = clean_phone.substr(0,3);
    var phone_exchange = clean_phone.substr(3,3);
    var phone_station  = clean_phone.substr(6,4);
    var phone_formatted = "";
    if (phone_area.length > 0) phone_formatted = phone_area;
    if (phone_exchange.length > 0) phone_formatted += "-" + phone_exchange;
    if (phone_station.length > 0) phone_formatted += "-" + phone_station;
    $(id).value = phone_formatted;
    return phone_formatted;
  }
  /*
   *util functions
   *
   *isNullorEmpty :: check for empty or null values
   *trim :: remove white space
   *showHide:: hide or show hidden fields passing switch state and id
   *isDefined :: checks if id/field exists
   */
  function trim (str){
    return str.replace(/^\s+/, "");
  }
  //test if null or empty
  function isNullOrEmpty(id){
    return (  (trim($F(id)) == null || trim($F(id)) == "") && isDefined(id)  )
  }
  function isDefined(id){
    if($(id) == null){
      if(document.getElementsByName(id).length == 0)
        return false;
    }else{
      return true;
    }
  }
  function fadeIn(id){
    if(isDefined(id)){
      new Effect.Appear(id);
    }
  }
  function fadeOut(id){
    if(isDefined(id)){
      new Effect.Fade(id);
    }
  }
  function clearErrorMessage(id){
    if(isDefined(id)){
      $(id).innerHTML="";
    }
  }
  function isValidSelection(error_id, error_msg){
    var is_valid = true;
    error_msg    = (error_msg == undefined) ? "\nThis is a required field" : error_msg;
    if(isDefined(error_id)){
      var parent      = $(error_id).parentNode;
      var selections  = parent.getElementsByTagName("SELECT");
      if(selections.length > 0){
        if ( $(selections[0].id).value == "" ){
          is_valid = false;
        }
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isOneSelected(error_id,error_msg){
    var is_valid = true;
    error_msg    = (error_msg == undefined) ? "\nPlease select one of the above options" : error_msg;
    if(isDefined(error_id) ){
      var radios = Form.getElements($(error_id).parentNode);
      is_valid   = radios.any(function(e){ return e.checked });
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isChecked(error_id,error_msg){
    var is_valid = true;
    error_msg    = (error_msg == undefined) ? "\nPlease select one of the above options" : error_msg;
    if(isDefined(error_id) ){
      var radios = Form.getElements($(error_id).parentNode);
      if ( radios.length > 0 && !radios[0].checked && !radios[1].checked  ){
        is_valid = false;
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isCheckedBox(error_id,error_msg, element_id){
    var is_valid = true;
    if(isDefined(error_id) ){
      var checkboxes = Form.getElements($(error_id).parentNode);
      checkboxes.each(function(element){ 
        if(element.id == element_id){
          if(!element.checked){
            error_msg = "\nThis is a required field";
            is_valid = false;
          }
          (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
          if($(error_id).innerHTML == "") {
            $(error_id).innerHTML = error_msg;
          }
        }
      });
    }
    return is_valid;
  }
  function unChecked(error_id){
    var is_valid = true;
    if(isDefined(error_id) ){
      var checkbox = Form.getElements($(error_id).parentNode);
      checkbox[0].checked = false;
      checkbox[1].checked = false;
    }
    return is_valid;
  }
  function isNotEmptyInput(error_id, error_msg){
    var is_not_empty = true;
    error_msg    = (error_msg == undefined) ? "\nThis is a required field" : error_msg;
    if(isDefined(error_id)){
      var input_field   = Form.getElements($(error_id).parentNode);
      if(input_field.length > 0){
        if ( isNullOrEmpty(input_field[0].id)   ){
          is_not_empty = false;
        }
      }
      (is_not_empty) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_not_empty;
  }
  function isValidNumber(error_id, error_msg){
    var is_valid = true;
    error_msg    = (error_msg == undefined) ? "\nThis is a numeric field" : error_msg;
    if(  isDefined(error_id)  ){
      var number_field  = Form.getElements($(error_id).parentNode);
      if(number_field.length > 0){
        if ( /\D/.test(trim($(number_field[0].id).value) )   ){
          is_valid = false;
        }
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isValidRequiredNumberInput(error_id, error_msg){
    var is_valid = true;
    error_msg    = (error_msg == "" || error_msg == undefined) ? undefined : error_msg;
    if(isDefined(error_id)){
      var number_field   = Form.getElements($(error_id).parentNode);
      if(number_field.length > 0){
        if (isNullOrEmpty(number_field[0].id)){
          error_msg    = "\nThis is a required field";
          is_valid = false;
        }else if ( /\D/.test( (trim($(number_field[0].id).value)) )  ){
          error_msg    = "\nThis is a numeric field";
          is_valid = false;
        }
        (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
        if($(error_id).innerHTML == "") {
          $(error_id).innerHTML = error_msg;
        }
      }
    }
    return is_valid;
  }
  function isValidWeight(error_id, error_msg){
    var is_valid = true;
    if(isDefined(error_id)){
      var number_field   = Form.getElements($(error_id).parentNode);
      if(number_field.length > 0){
        if (isNullOrEmpty(number_field[0].id)){
          error_msg    = "\nThis is a required field";
          fadeIn(error_id);
          is_valid = false;
        }else if ( /\D/.test( (trim($(number_field[0].id).value)) )  ){
          error_msg    = "\nThis is a numeric field";
          fadeIn(error_id);
          is_valid = false;
        }else if (!/^[1-9]{1}$|^[1-9]{1}[0-9]{1,2}$/.test($F(number_field[0].id))){
          error_msg    = "\nPlease enter a valid weight";
          fadeIn(error_id);
          is_valid = false;
        }else{
          fadeOut(error_id);
        }
        if($(error_id).innerHTML == "") {
          $(error_id).innerHTML = error_msg;
        }
      }
    }
    return is_valid;
  }
  function isValidRequiredAlphaInput(error_id, error_msg){
    var is_valid = true;
    if(isDefined(error_id)){
      var alpha_field   = Form.getElements($(error_id).parentNode);
      if(alpha_field.length > 0){
        if (isNullOrEmpty(alpha_field[0].id)){
          error_msg    = "\nThis is a required field";
          fadeIn(error_id);
          is_valid = false;
        }else if ( !/^[\D]+$/.test( (trim($(alpha_field[0].id).value)) )  ){
          error_msg    = "\nPlease use letters only (a-z)";
          fadeIn(error_id);
          is_valid = false;
        }else{
          fadeOut(error_id);
        }
        if($(error_id).innerHTML == "") {
          $(error_id).innerHTML = error_msg;
        }
      }
    }
    return is_valid;
  }
  function isValidUsState(error_id, error_msg){
    var is_valid   = true;
    if( isDefined(error_id) ){
      var parent_node    = $(error_id).parentNode;
      var states         = parent_node.getElementsByTagName("SELECT");
      error_msg          = (error_msg == undefined) ? "\nPlease select a state" : error_msg;
      if(states.length == 0){ //checks for drop down element is valid
        var states   = parent_node.getElementsByTagName("INPUT");
        error_msg    = (error_msg == undefined) ? "\nPlease enter a valid state" : error_msg;
      }else if( !/^[a-z]{2}$/i.test(states[0].value)   ){
        fadeIn(error_id);
        is_valid = false;
      }else{
        fadeOut(error_id);
      }
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isValidCityStateZip(error_id){
    var location = Form.getElements($(error_id).parentNode);
    if(location.length == 3){
      var is_valid          = (!isNullOrEmpty(location[0].id) || !isNullOrEmpty(location[1].id) || !isNullOrEmpty(location[2].id));
      var error_msg = "\nThese are required fields";
      if(is_valid){
        is_valid  = ( /^[\D]+$/.test( (trim(location[0].value)) ) );
        error_msg ="\nPlease use letters only (a-z) for your city";
      }
      if(is_valid){
        var states = new Array("AK" ,"AL" ,"AR" ,"AZ" ,"CA" ,"CO" ,"CT" ,"DC" ,"DE" ,"FL" ,"GA" ,"HI" ,"IA" ,"ID" ,"IL" ,"IN" ,"KS" ,"KY" ,"LA" ,"MA" ,"MD" ,"ME" ,"MI" ,"MN" ,"MO" ,"MS" ,"MT" ,"NC" ,"ND" ,"NE" ,"NH" ,"NJ" ,"NM" ,"NV" ,"NY","OH" ,"OK" ,"OR" ,"PA" ,"RI" ,"SC" ,"SD" ,"TN" ,"TX" ,"UT" ,"VA" ,"VT" ,"WA" ,"WI" ,"WV" ,"WY" ,"BN");
        is_valid  = (/^[a-z]{2}$/i.test(location[1].value) && (states.any(function(ele){ return (location[1].value).toLowerCase() == ele.toLowerCase() })) );
        error_msg = "\nPlease enter a valid state";
      }
      if(is_valid){
        is_valid  = (/^\d{5}$/.test(location[2].value));
        error_msg = "\nPlease use numbers only (0-9) for your zipcode";
      }
    }
    (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
    if($(error_id).innerHTML == "") {
      $(error_id).innerHTML = error_msg;
    }
    return is_valid;
  }
  function isValidEmail(error_id, error_msg){
    var is_valid = true;
    // validate email
    if( isDefined(error_id)  ){
      var email_field = Form.getElements($(error_id).parentNode);
      if(email_field.length > 0){
        var email     = email_field[0].id;
        if (isNullOrEmpty(email)  ){
          error_msg = "\nPlease enter your email";
          is_valid = false;
        }else if (!/^([A-Z0-9]+[._]?){1,}[A-Z0-9-]+\@(([A-Z0-9]+[-]?){1,}[A-Z0-9]+\.){1,}([A-Z]{2,4}|museum)$/i.test($F(email))){
          error_msg = "\nPlease enter a valid email";
          is_valid = false;
        }
        (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
        if($(error_id).innerHTML == "") {
          $(error_id).innerHTML = error_msg;
        }
      }
    }
    return is_valid;
  }
  function isValidPhone(error_id, error_msg){
    var is_valid     = true;
    if(  isDefined(error_id)  ){
      var phone_fields = Form.getElements($(error_id).parentNode);
      if(phone_fields.length == 3){
        var phone_area      = phone_fields[0].value;
        var phone_exchange  = phone_fields[1].value;
        var phone_station   = phone_fields[2].value;
      }else if(phone_fields.length == 1){
        reformatPhone($(phone_fields[0]));
        var clean_phone     = (phone_fields[0].value).gsub(/\D/, "");
        var phone_area      = clean_phone.substr(0,3);
        var phone_exchange  = clean_phone.substr(3,3);
        var phone_station   = clean_phone.substr(6,4);
      }
      if(  !/^[2-9][0-8][0-9]$/.test(phone_area) || !/^[2-9][0-9][0-9]$/.test(phone_exchange) || !/^[0-9][0-9][0-9][0-9]$/.test(phone_station)  ){
        is_valid = false;
        error_msg = "\nPlease enter a valid phone number";;
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isValidHeight(error_id, error_msg){
    var is_valid = true;
    error_msg    = (error_msg == undefined) ? "\nPlease select a valid height" : error_msg;
    //validate height-weight
    if(isDefined(error_id)){
      var parent_node   = $(error_id).parentNode;
      var height_fields = parent_node.getElementsByTagName("SELECT");
      if(height_fields.length == 0){
        var height_fields = parent_node.getElementsByTagName("INPUT");
        error_msg = (error_msg == undefined) ? "\nPlease enter a valid height" : error_msg;
      }
      var height_feet   = trim($(height_fields[0].id).value);
      var height_inches = trim($(height_fields[1].id).value);
      if(  !/^\d$/.test(height_feet) && /^$/.test(height_feet) ){
        is_valid = false;
      }
      if(  is_valid  ){
        if(  !/^\d$/.test(height_inches) && /^$/.test(height_inches) ){
          is_valid = false;
        }
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  function isValidZip(error_id, error_msg){
    var is_valid   = true;
    error_msg    = (error_msg == undefined) ? "\nPlease enter a valid zip code" : error_msg;
    if(isDefined(error_id)){
      var zipcode     = Form.getElements($(error_id).parentNode);
      if(  !/^\d{5}$/.test($F(zipcode[0].id))  ){
        is_valid = false;
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }
  /*
   *isValidDate(error_id)
   *returns: true/false
   *checks that the date belongs to the month within the given year
   */
  function isValidDob(error_id){
    var is_valid = true;
    is_valid     = isValidDate(error_id);
    if(is_valid){
      var parent_node       = $(error_id).parentNode;
      var dob_fields        = parent_node.getElementsByTagName("SELECT");
      $(error_id).hide();
      error_msg = "\nPlease select a valid date of birth";
      if(dob_fields.length == 0){
        var dob_fields        = parent_node.getElementsByTagName("INPUT");
        error_msg = "\nPlease enter a valid date of birth";
      }
      if(  dob_fields.length == 3  ){
        var user_date   = new Date();
        var today       = new Date()
        user_date.setFullYear( dob_fields[2].value, (dob_fields[0].value - 1),  dob_fields[1].value );
        is_valid        = (user_date <= today);
      }
    }
    (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
    if($(error_id).innerHTML == "") {
      $(error_id).innerHTML = error_msg;
    }
    return is_valid;
  }
  /*
   *isValidCoverage(error_id)
   *returns: true/false
   *checks that the date belongs to the month within the given year, and
   *cannot be earlier than the current date
   */
 function isValidCoverage(error_id){
    var is_valid = true;
    is_valid     = isValidDate(error_id);
    if(is_valid){
      var todays_date   = new Date();
      var current_month = todays_date.getMonth() + 1;
      var current_day   = todays_date.getDate();
      var current_year  = todays_date.getFullYear();
      var parent_node   = $(error_id).parentNode;
      var date_fields   = parent_node.getElementsByTagName("SELECT");
      error_msg         = "\nPlease select a valid coverage date";
      if(date_fields.length == 0){
        var date_fields = parent_node.getElementsByTagName("INPUT");
        error_msg       = "\nPlease enter a valid coverage date";
      }
      if(  date_fields.length == 3  ){
        var id_mm   = date_fields[0].id;
        var id_dd   = date_fields[1].id;
        var id_yyyy = date_fields[2].id;
        if($(id_yyyy).value < current_year){
          is_valid = false;
        }else if($(id_yyyy).value == current_year){
          if($(id_mm).value < current_month){
            is_valid = false;
          }else if($(id_mm).value == current_month){
            if($(id_dd).value < current_day){
              is_valid = false;
            }
          }
        }
        if(!is_valid){
          error_msg = "\nPlease select a valid <em>future</em> date less than 3 months from now";
        }
        if(is_valid){
          /* Now that we know the date is at least a valid format, check to see that the coverage date is within a sensible range */
          var month = $F(date_fields[0]) * 1 - 1;
          var day   = $F(date_fields[1]) * 1;
          var year  = $F(date_fields[2]) * 1;
          var coverage_date = new Date(year, month, day);
          /* not more than 3 months from now  */
          var three_months_from_now = new Date();
          three_months_from_now.setDate(todays_date.getDate() + 90);
          var less_than_three_months_from_now = (coverage_date - three_months_from_now) <= 0;
          if (!less_than_three_months_from_now){
            error_msg = "\nPlease select a valid future date <em>less than 3 months from now</em>";
            is_valid = false;
          }
        }
      }
    }
    (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
    if($(error_id).innerHTML == "") {
      $(error_id).innerHTML = error_msg;
    }
    return is_valid;
 }
  /*
   *isValidChildDob(error_id)
   *returns: true/false
   *validates the date, child has to be  less than 25 yrs old, and younger than the youngest parent
   */
  function isValidChildDob(error_id){
    var is_valid = true;
    is_valid     = isValidDate(error_id);
    if(is_valid){
      $(error_id).style.display = "none";
      var parent_node   = $(error_id).parentNode;
      var date_fields   = parent_node.getElementsByTagName("SELECT");
      error_msg = "\nPlease select a valid date of birth";
      if(date_fields.length == 0){
        var date_fields = parent_node.getElementsByTagName("INPUT");
        error_msg = "\nPlease enter a valid date of birth";
      }
      if( date_fields.length == 3 ){
        var child_mm     = $F(date_fields[0].id) - 1;
        var child_dd     = $F(date_fields[1].id);
        var child_yyyy   = $F(date_fields[2].id);
        var child_date   = new Date();
        var todays_date  = new Date();
        child_date.setFullYear(child_yyyy, child_mm, child_dd);
        //cannot be a future date
        is_valid         = (todays_date > child_date);
        if(is_valid){
          /*
           *child has to be at least 25yrs old
          */
          var child_age   = todays_date.getFullYear() - child_date.getFullYear();
          if(child_age > 25){
            is_valid = false;
            error_msg = "\nQuotes cannot be provided for children over 25 years old"
          }else{
            /*
             *compare child and parent
             */
            //get parent(s) dates
            if($("dob1_yyyy_on") && $("dob1_mm_on") && $("dob1_dd_on")) {
              var parent_date  = new Date();
              parent_date.setFullYear($F("dob1_yyyy_on"), ($F("dob1_mm_on") - 1), $F("dob1_dd_on"));
            }
            if($F("dob2_yyyy_on") != "" && $F("dob2_mm_on") != "" && $F("dob2_dd_on") != ""){
              var spouse_date  = new Date();
              spouse_date.setFullYear($F("dob2_yyyy_on"), ($F("dob2_mm_on") - 1), $F("dob2_dd_on"));
              if(!parent_date) {
                var parent_date	=	spouse_date
              }
            }
            //pick youngest parent
            var youngest_parent  = parent_date;
            if(spouse_date){
              var youngest_parent = (spouse_date > parent_date) ? spouse_date : parent_date;
            }
            //younger than the parent
            if(child_date <= youngest_parent){
              is_valid = false;
              error_msg = "\nChildren cannot be older than the parent(s)"
            }
          }
        }
      }
    }
    (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
    if($(error_id).innerHTML == "") {
      $(error_id).innerHTML = error_msg;
    }
    return is_valid;
  }
  /*
   *isValidDate(error_id)
   *returns: true/false
   *checks that the date belongs to the month within the given year
   */
 function isValidDate(error_id){
    var is_valid         = true;
    if(isDefined(error_id)){
      var error_msg      = "\nPlease select a valid date";
      var parent_node    = $(error_id).parentNode;
      var date_fields    = parent_node.getElementsByTagName("SELECT");
      if(date_fields.length == 0){
        var date_fields  = parent_node.getElementsByTagName("INPUT");
        error_msg        = "\nPlease enter a valid date";
      }
      if(  date_fields.length == 3  ){
        var new_date  = new Date();
        var this_mm   = date_fields[0].value - 1;
        var full_date = date_fields[0].value + "/" + date_fields[1].value + "/" + date_fields[2].value;
        new_date.setFullYear( date_fields[2].value, this_mm,  date_fields[1].value );
        if($(date_fields[0]).value == "" || new_date.getMonth() != this_mm ||
           $(date_fields[1]).value == "" || /Invalid|NaN/.test(new Date(full_date)) ||
           $(date_fields[2]).value == "" || date_fields[2].value < 1911    || date_fields[2].value > 2038){
            is_valid = false;
        }
      }
      (is_valid) ? fadeOut(error_id) : fadeIn(error_id);
      if($(error_id).innerHTML == "") {
        $(error_id).innerHTML = error_msg;
      }
    }
    return is_valid;
  }