/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Travis Beckham :: http://www.squidfingers.com | http://www.podlob.com */

// |||||||||||||||||||||||||||||||||||||||||||||||||||||
//
// Coded by Travis Beckham
// http://www.squidfingers.com | http://www.podlob.com
// If want to use this code, feel free to do so, but
// please leave this message intact.
//
// |||||||||||||||||||||||||||||||||||||||||||||||||||||
// --- version date: 11/21/02 --------------------------

// returns true if the string is empty
function isEmpty(str){
  return (str == null) || (str.length == 0);
}
// returns true if the string is a valid email
function isEmail(str){
  if(isEmpty(str)) return false;
  var re = /^[^\s()<>@,;:\/]+@\w[\w\.-]+\.[a-z]{2,}$/i
  return re.test(str);
}
// returns true if the string only contains characters A-Z or a-z
function isAlpha(str){
  var re = /[^a-zA-Z]/g
  if (re.test(str)) return false;
  return true;
}
// returns true if the string only contains characters 0-9
function isNumeric(str){
  var re = /[\D]/g
  if (re.test(str)) return false;
  return true;
}
// returns true if the string only contains characters A-Z, a-z or 0-9
function isAlphaNumeric(str){
  var re = /[^a-zA-Z0-9]/g
  if (re.test(str)) return false;
  return true;
}
// returns true if the string's length equals "len"
function isLength(str, len){
  return str.length == len;
}
// returns true if the string's length is between "min" and "max"
function isLengthBetween(str, min, max){
  return (str.length >= min)&&(str.length <= max);
}
// returns true if the string is a US phone number formatted as...
// (000)000-0000, (000) 000-0000, 000-000-0000, 000.000.0000, 000 000 0000, 0000000000
function isPhoneNumber(str){
  var re = /^\(?[2-9]\d{2}[\)\.-]?\s?\d{3}[\s\.-]?\d{4}$/
  return re.test(str);
}
// returns true if the string is a valid date formatted as...
// mm dd yyyy, mm/dd/yyyy, mm.dd.yyyy, mm-dd-yyyy
function isDate(str){
  var re = /^(\d{1,2})[\s\.\/-](\d{1,2})[\s\.\/-](\d{4})$/
  if (!re.test(str)) return false;
  var result = str.match(re);
  var m = parseInt(result[1]);
  var d = parseInt(result[2]);
  var y = parseInt(result[3]);
  if(m < 1 || m > 12 || y < 1900 || y > 2100) return false;
  if(m == 2){
          var days = ((y % 4) == 0) ? 29 : 28;
  }else if(m == 4 || m == 6 || m == 9 || m == 11){
          var days = 30;
  }else{
          var days = 31;
  }
  return (d >= 1 && d <= days);
}
// returns true if "str1" is the same as the "str2"
function isMatch(str1, str2){
  return str1 == str2;
}
// returns true if the string contains only whitespace
// cannot check a password type input for whitespace
function isWhitespace(str){ // NOT USED IN FORM VALIDATION
  var re = /[\S]/g
  if (re.test(str)) return false;
  return true;
}
// removes any whitespace from the string and returns the result
// the value of "replacement" will be used to replace the whitespace (optional)
function stripWhitespace(str, replacement){// NOT USED IN FORM VALIDATION
  if (replacement == null) replacement = '';
  var result = str;
  var re = /\s/g
  if(str.search(re) != -1){
    result = str.replace(re, replacement);
  }
  return result;
}
// validate the form
function validateForm(f, preCheck){
  var errors = '';
  if(preCheck != null) errors += preCheck;
  var i,e,t,n,v;
  for(i=0; i < f.elements.length; i++){
    e = f.elements[i];
    
    if(e.optional) 
      continue;
    
    t = e.type;
    n = e.id;
    v = e.value;
    if(t == 'text' || t == 'password' || t == 'textarea') {
      
      if(isEmpty(v)) {
        errors += n+' nemůže být prázdné.\n'; 
        e.className = e.className.replace(/_required/, "") + "_required";
        continue;
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(v == e.defaultValue) {
        errors += n+' nemůže obsahovat základní hodnotu.\n'; 
        e.className = e.className.replace(/_required/, "") + "_required";
        continue;
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isAlpha) {
        if(!isAlpha(v)){
          errors += n+' může obsahovat pouze znaky A-Z a-z.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isNumeric) {
        if(!isNumeric(v)){
          errors += n+' může obsahovat pouze znaky 0-9.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isAlphaNumeric) {
        if(!isAlphaNumeric(v)){
          errors += n+' může obsahovat pouze znaky A-Z a-z 0-9.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isEmail) {
        if(!isEmail(v)){
          errors += v+' není správný formát emailu.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isLength != null) {
        var len = e.isLength;
        if(!isLength(v,len)){
          errors += n+' může obsahovat '+len+' znaků.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isLengthBetween != null) {
        var min = e.isLengthBetween[0];
        var max = e.isLengthBetween[1];
        if(!isLengthBetween(v,min,max)){
          errors += n+' nesmí obsahovat míň jako '+min+' a víc jako '+max+' znaků.\n';
          e.className = e.className.replace(/_required/, "") + "_required"; 
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isPhoneNumber) {
        if(!isPhoneNumber(v)){
          errors += v+' není platné telefónne číslo.\n';
          e.className = e.className.replace(/_required/, "") + "_required"; 
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isDate) {
        if(!isDate(v)){
          errors += v+' není platný datum.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
      if(e.isMatch != null) {
        if(!isMatch(v, e.isMatch)){
          errors += n+' neodpovídá.\n'; 
          e.className = e.className.replace(/_required/, "") + "_required";
          continue;
        }
      } else {
        e.className = e.className.replace(/_required/, "");         
      }
      
    }
    
    
    if(t.indexOf('select') != -1) {
      if(isEmpty(e.options[e.selectedIndex].value)){
        errors += n+' vyžaduje vybranou hodnotu.\n'; 
        e.className = e.className.replace(/_required/, "") + "_required";
        continue;
      }
    } else {
      e.className = e.className.replace(/_required/, "");         
    }
      
    if(t == 'file') {
      if(isEmpty(v)){
        errors += n+' vyžaduje soubor na uploadování.\n';
        e.className = e.className.replace(/_required/, "") + "_required"; 
        continue;
      }
    } else {
      e.className = e.className.replace(/_required/, "");         
    }      
  }
  if(errors != '') 
    alert(errors);
  
  return errors == '';
}

/*
The following elements are not validated...

button   type="button"
checkbox type="checkbox"
hidden   type="hidden"
radio    type="radio"
reset    type="reset"
submit   type="submit"

All elements are assumed required and will only be validated for an
empty value or defaultValue unless specified by the following properties.

isEmail = true;          // valid email address
isAlpha = true;          // A-Z a-z characters only
isNumeric = true;        // 0-9 characters only
isAlphaNumeric = true;   // A-Z a-z 0-9 characters only
isLength = number;       // must be exact length
isLengthBetween = array; // [lowNumber, highNumber] must be between lowNumber and highNumber
isPhoneNumber = true;    // valid US phone number. See "isPhoneNumber()" comments for the formatting rules
isDate = true;           // valid date. See "isDate()" comments for the formatting rules
isMatch = string;        // must match string
optional = true;         // element will not be validated
*/

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// --------------------------------------------------
// ||||||||||||||||||||||||||||||||||||||||||||||||||

// All of the previous JavaScript is coded to process
// any form and should be kept in an external file if
// multiple forms are being processed.

// This function configures the previous
// form validation code for this form.

    function configureNabidky(f, alerttype)
    {
      f.advert_function.isEmpty = true;
      f.advert_type.isEmpty = true;
      f.region_id.isEmpty = true;
      f.title.isEmpty = true;
      f.advert_price.isNumeric = true;
      f.advert_price_note.optional = true;
      f.advert_price_unit.isEmpty = true;
      f.advert_street.optional = true;
      f.advert_co.optional = true;
      f.advert_cp.optional = true;
      f.advert_citypart.optional = true;
      f.advert_city.isEmpty = true;
      f.basic_description.isEmpty = true;
      f.description.optional = true;
      f.client_name.isEmpty = true;
      f.client_phone.isEmpty = true;
      f.client_email.optional = true;
      return validateForm(f, '');
    }
    
    function configurePoptavky(f, alerttype)
    {  
      f.advert_function.isEmpty = true;
      f.advert_type.isEmpty = true;
      f.region_id_demand.isEmpty = true;
      f.title.isEmpty = true;   
      f.advert_price_from.optional= true;
      f.advert_price_to.optional= true;
      f.advert_price_note.optional = true;
      f.advert_price_unit.isEmpty = true;
      f.basic_description.isEmpty = true;
      f.description.optional = true;
      f.advert_pair_email.optional = true;
      f.client_name.isEmpty = true;
      f.client_phone.isEmpty = true;
      f.client_email.optional = true;               
    
      return validateForm(f, '');
    }