var ValidForm = function(element, optionsObj){
  	this.initialize(element, optionsObj);
}

ValidForm.VERSION = '1.3 standalone';



ValidForm.TEXTAREA 		= 1;
ValidForm.TEXT 			    = 2;
ValidForm.PASSWORD 		= 3;
ValidForm.CHECKBOX 		= 4;
ValidForm.SELECT = 5;
ValidForm.FILE = 6;


ValidForm.massValidate = function(validations){
  var returnValue = true;
	for(var i = 0, len = validations.length; i < len; ++i ){
		var valid = validations[i].validate();
		if(returnValue) returnValue = valid;
	}
	return returnValue;
}


ValidForm.prototype = {

    validClass: 'LV_valid',
    invalidClass: 'LV_invalid',
    messageClass: 'LV_validation_message',
    validFieldClass: 'LV_valid_field',
    invalidFieldClass: 'LV_invalid_field',
    initialize: function(element, optionsObj){
      var self = this;
      if(!element) throw new Error("ValidForm::initialize - No element reference or element id has been provided!");
    	this.element = element.nodeName ? element : document.getElementById(element);
    	if(!this.element) throw new Error("ValidForm::initialize - No element with reference or id of '" + element + "' exists!");
     
    	this.validations = [];
      this.elementType = this.getElementType();
      this.form = this.element.form;

    	var options = optionsObj || {};
    	this.validMessage = options.validMessage || 'Thankyou!';
    	var node = options.insertAfterWhatNode || this.element;
		this.insertAfterWhatNode = node.nodeType ? node : document.getElementById(node);
      this.onValid = options.onValid || function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); };
      this.onInvalid = options.onInvalid || function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); };	
    	this.onlyOnBlur =  options.onlyOnBlur || false;
    	this.wait = options.wait || 0;
      this.onlyOnSubmit = options.onlyOnSubmit || false;
     
      if(this.form){
        this.formObj = ValidFormForm.getInstance(this.form);
        this.formObj.addField(this);
      }

      this.oldOnFocus = this.element.onfocus || function(){};
      this.oldOnBlur = this.element.onblur || function(){};
      this.oldOnClick = this.element.onclick || function(){};
      this.oldOnChange = this.element.onchange || function(){};
      this.oldOnKeyup = this.element.onkeyup || function(){};
      this.element.onfocus = function(e){ self.doOnFocus(e); return self.oldOnFocus.call(this, e); }
      if(!this.onlyOnSubmit){
        switch(this.elementType){
          case ValidForm.CHECKBOX:
            this.element.onclick = function(e){ self.validate(); return self.oldOnClick.call(this, e); }
          // let it run into the next to add a change event too
          case ValidForm.SELECT:
          case ValidForm.FILE:
            this.element.onchange = function(e){ self.validate(); return self.oldOnChange.call(this, e); }
            break;
          default:
            if(!this.onlyOnBlur) this.element.onkeyup = function(e){ self.deferValidation(); return self.oldOnKeyup.call(this, e); }
      	    this.element.onblur = function(e){ self.doOnBlur(e); return self.oldOnBlur.call(this, e); }
        }
      }
    },

    destroy: function(){
  	  if(this.formObj){
	
		this.formObj.removeField(this);
		
		this.formObj.destroy();
	  }
 
	  this.element.onfocus = this.oldOnFocus;
      if(!this.onlyOnSubmit){
        switch(this.elementType){
          case ValidForm.CHECKBOX:
            this.element.onclick = this.oldOnClick;
        
          case ValidForm.SELECT:
          case ValidForm.FILE:
            this.element.onchange = this.oldOnChange;
            break;
          default:
            if(!this.onlyOnBlur) this.element.onkeyup = this.oldOnKeyup;
      	    this.element.onblur = this.oldOnBlur;
        }
      }
      this.validations = [];
	  this.removeMessageAndFieldClass();
    },

    add: function(validationFunction, validationParamsObj){
      this.validations.push( {type: validationFunction, params: validationParamsObj || {} } );
      return this;
    },

    remove: function(validationFunction, validationParamsObj){
	  var found = false;
	  for( var i = 0, len = this.validations.length; i < len; i++ ){
	  		if( this.validations[i].type == validationFunction ){
				if (this.validations[i].params == validationParamsObj) {
					found = true;
					break;
				}
			}
	  }
      if(found) this.validations.splice(i,1);
      return this;
    },
    
	
    deferValidation: function(e){
      if(this.wait >= 300) this.removeMessageAndFieldClass();
    	var self = this;
      if(this.timeout) clearTimeout(self.timeout);
      this.timeout = setTimeout( function(){ self.validate() }, self.wait); 
    },
       
    doOnBlur: function(e){
      this.focused = false;
      this.validate(e);
    },
    doOnFocus: function(e){
      this.focused = true;
      this.removeMessageAndFieldClass();
    },
    

    getElementType: function(){
      switch(true){
        case (this.element.nodeName.toUpperCase() == 'TEXTAREA'):
        return ValidForm.TEXTAREA;
      case (this.element.nodeName.toUpperCase() == 'INPUT' && this.element.type.toUpperCase() == 'TEXT'):
        return ValidForm.TEXT;
      case (this.element.nodeName.toUpperCase() == 'INPUT' && this.element.type.toUpperCase() == 'PASSWORD'):
        return ValidForm.PASSWORD;
      case (this.element.nodeName.toUpperCase() == 'INPUT' && this.element.type.toUpperCase() == 'CHECKBOX'):
        return ValidForm.CHECKBOX;
      case (this.element.nodeName.toUpperCase() == 'INPUT' && this.element.type.toUpperCase() == 'FILE'):
        return ValidForm.FILE;
      case (this.element.nodeName.toUpperCase() == 'SELECT'):
        return ValidForm.SELECT;
        case (this.element.nodeName.toUpperCase() == 'INPUT'):
        	throw new Error('ValidForm::getElementType - Cannot use ValidForm on an ' + this.element.type + ' input!');
        default:
        	throw new Error('ValidForm::getElementType - Element must be an input, select, or textarea!');
      }
    },
   
    doValidations: function(){
      	this.validationFailed = false;
      	for(var i = 0, len = this.validations.length; i < len; ++i){
    	 	var validation = this.validations[i];
    		switch(validation.type){
    		   	case Validate.Presence:
                case Validate.Confirmation:
                case Validate.Acceptance:
    		   		this.displayMessageWhenEmpty = true;
    		   		this.validationFailed = !this.validateElement(validation.type, validation.params); 
    				break;
    		   	default:
    		   		this.validationFailed = !this.validateElement(validation.type, validation.params);
    		   		break;
    		}
    		if(this.validationFailed) return false;	
    	}
    	this.message = this.validMessage;
    	return true;
    },
   
    validateElement: function(validationFunction, validationParamsObj){
      	var value = (this.elementType == ValidForm.SELECT) ? this.element.options[this.element.selectedIndex].value : this.element.value;     
        if(validationFunction == Validate.Acceptance){
    	    if(this.elementType != ValidForm.CHECKBOX) throw new Error('ValidForm::validateElement - Element to validate acceptance must be a checkbox!');
    		value = this.element.checked;
    	}
        var isValid = true;
      	try{    
    		validationFunction(value, validationParamsObj);
    	} catch(error) {
    	  	if(error instanceof Validate.Error){
    			if( value !== '' || (value === '' && this.displayMessageWhenEmpty) ){
    				this.validationFailed = true;
    				this.message = error.message;
    				isValid = false;
    			}
    		}else{
    		  	throw error;
    		}
    	}finally{
    	    return isValid;
        }
    },
   
    validate: function(){
      if(!this.element.disabled){
		var isValid = this.doValidations();
		if(isValid){
			this.onValid();
			return true;
		}else {
			this.onInvalid();
			return false;
		}
	  }else{
      return true;
    }
    },
	
  enable: function(){
  	this.element.disabled = false;
	return this;
  },
 
  disable: function(){
  	this.element.disabled = true;
	this.removeMessageAndFieldClass();
	return this;
  },
   
    createMessageSpan: function(){
        var span = document.createElement('span');
    	var textNode = document.createTextNode(this.message);
      	span.appendChild(textNode);
        return span;
    },
   
    insertMessage: function(elementToInsert){
      	this.removeMessage();
      	if( (this.displayMessageWhenEmpty && (this.elementType == ValidForm.CHECKBOX || this.element.value == ''))
    	  || this.element.value != '' ){
            var className = this.validationFailed ? this.invalidClass : this.validClass;
    	  	elementToInsert.className += ' ' + this.messageClass + ' ' + className;
            if(this.insertAfterWhatNode.nextSibling){
    		  		this.insertAfterWhatNode.parentNode.insertBefore(elementToInsert, this.insertAfterWhatNode.nextSibling);
    		}else{
    			    this.insertAfterWhatNode.parentNode.appendChild(elementToInsert);
    	    }
    	}
    },
    
    addFieldClass: function(){
        this.removeFieldClass();
        if(!this.validationFailed){
            if(this.displayMessageWhenEmpty || this.element.value != ''){
                if(this.element.className.indexOf(this.validFieldClass) == -1) this.element.className += ' ' + this.validFieldClass;
            }
        }else{
            if(this.element.className.indexOf(this.invalidFieldClass) == -1) this.element.className += ' ' + this.invalidFieldClass;
        }
    },
    
    removeMessage: function(){
    	var nextEl;
    	var el = this.insertAfterWhatNode;
    	while(el.nextSibling){
    	    if(el.nextSibling.nodeType === 1){
    		  	nextEl = el.nextSibling;
    		  	break;
    		}
    		el = el.nextSibling;
    	}
      	if(nextEl && nextEl.className.indexOf(this.messageClass) != -1) this.insertAfterWhatNode.parentNode.removeChild(nextEl);
    },
    
    removeFieldClass: function(){
      if(this.element.className.indexOf(this.invalidFieldClass) != -1) this.element.className = this.element.className.split(this.invalidFieldClass).join('');
      if(this.element.className.indexOf(this.validFieldClass) != -1) this.element.className = this.element.className.split(this.validFieldClass).join(' ');
    },
 
    removeMessageAndFieldClass: function(){
      this.removeMessage();
      this.removeFieldClass();
    }

} 
var ValidFormForm = function(element){
  this.initialize(element);
}
ValidFormForm.instances = {};
ValidFormForm.getInstance = function(element){
  var rand = Math.random() * Math.random();
  if(!element.id) element.id = 'formId_' + rand.toString().replace(/\./, '') + new Date().valueOf();
  if(!ValidFormForm.instances[element.id]) ValidFormForm.instances[element.id] = new ValidFormForm(element);
  return ValidFormForm.instances[element.id];
}

ValidFormForm.prototype = {
  initialize: function(element){
  	this.name = element.id;
    this.element = element;
    this.fields = [];
   
	this.oldOnSubmit = this.element.onsubmit || function(){};
    var self = this;
    this.element.onsubmit = function(e){
      return (ValidForm.massValidate(self.fields)) ? self.oldOnSubmit.call(this, e || window.event) !== false : false;
    }
  },
  addField: function(newField){
    this.fields.push(newField);
  },
  removeField: function(victim){
  	var victimless = [];
  	for( var i = 0, len = this.fields.length; i < len; i++){
		if(this.fields[i] !== victim) victimless.push(this.fields[i]);
	}
    this.fields = victimless;
  },
  destroy: function(force){
  	// only destroy if has no fields and not being forced
  	if (this.fields.length != 0 && !force) return false;
	// remove events - set back to previous events
	this.element.onsubmit = this.oldOnSubmit;
	// remove from the instances namespace
	ValidFormForm.instances[this.name] = null;
	return true;
  }
   
}
var Validate = {
    Presence: function(value, paramsObj){
      	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Это поле обязательное!";
    	if(value === '' || value === null || value === undefined){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    
    Numericality: function(value, paramsObj){
        var suppliedValue = value;
        var value = Number(value);
    	var paramsObj = paramsObj || {};
        var minimum = ((paramsObj.minimum) || (paramsObj.minimum == 0)) ? paramsObj.minimum : null;;
        var maximum = ((paramsObj.maximum) || (paramsObj.maximum == 0)) ? paramsObj.maximum : null;
    	var is = ((paramsObj.is) || (paramsObj.is == 0)) ? paramsObj.is : null;
        var notANumberMessage = paramsObj.notANumberMessage || "В этом поле может быть только цифры!";
        var notAnIntegerMessage = paramsObj.notAnIntegerMessage || "Число должно быть целым!";
    	var wrongNumberMessage = paramsObj.wrongNumberMessage || "Должно быть" + is + "!";
    	var tooLowMessage = paramsObj.tooLowMessage || "Минимум " + minimum + " символов!";
    	var tooHighMessage = paramsObj.tooHighMessage || "Must not be more than " + maximum + "!";
        if (!isFinite(value)) Validate.fail(notANumberMessage);
        if (paramsObj.onlyInteger && (/\.0+$|\.$/.test(String(suppliedValue))  || value != parseInt(value)) ) Validate.fail(notAnIntegerMessage);
    	switch(true){
    	  	case (is !== null):
    	  		if( value != Number(is) ) Validate.fail(wrongNumberMessage);
    			break;
    	  	case (minimum !== null && maximum !== null):
    	  		Validate.Numericality(value, {tooLowMessage: tooLowMessage, minimum: minimum});
    	  		Validate.Numericality(value, {tooHighMessage: tooHighMessage, maximum: maximum});
    	  		break;
    	  	case (minimum !== null):
    	  		if( value < Number(minimum) ) Validate.fail(tooLowMessage);
    			break;
    	  	case (maximum !== null):
    	  		if( value > Number(maximum) ) Validate.fail(tooHighMessage);
    			break;
    	}
    	return true;
    },
    
    Format: function(value, paramsObj){
      var value = String(value);
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Not valid!";
      var pattern = paramsObj.pattern || /./;
      var negate = paramsObj.negate || false;
      if(!negate && !pattern.test(value)) Validate.fail(message); // normal
      if(negate && pattern.test(value)) Validate.fail(message); // negated
    	return true;
    },
    Email: function(value, paramsObj){
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Не правильно введён email адрес!";
    	Validate.Format(value, { failureMessage: message, pattern: /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i } );
    	return true;
    },
    		

    Length: function(value, paramsObj){
    	var value = String(value);
    	var paramsObj = paramsObj || {};
        var minimum = ((paramsObj.minimum) || (paramsObj.minimum == 0)) ? paramsObj.minimum : null;
    	var maximum = ((paramsObj.maximum) || (paramsObj.maximum == 0)) ? paramsObj.maximum : null;
    	var is = ((paramsObj.is) || (paramsObj.is == 0)) ? paramsObj.is : null;
        var wrongLengthMessage = paramsObj.wrongLengthMessage || "Must be " + is + " characters long!";
    	var tooShortMessage = paramsObj.tooShortMessage || "Must not be less than " + minimum + " characters long!";
    	var tooLongMessage = paramsObj.tooLongMessage || "Must not be more than " + maximum + " characters long!";
    	switch(true){
    	  	case (is !== null):
    	  		if( value.length != Number(is) ) Validate.fail(wrongLengthMessage);
    			break;
    	  	case (minimum !== null && maximum !== null):
    	  		Validate.Length(value, {tooShortMessage: tooShortMessage, minimum: minimum});
    	  		Validate.Length(value, {tooLongMessage: tooLongMessage, maximum: maximum});
    	  		break;
    	  	case (minimum !== null):
    	  		if( value.length < Number(minimum) ) Validate.fail(tooShortMessage);
    			break;
    	  	case (maximum !== null):
    	  		if( value.length > Number(maximum) ) Validate.fail(tooLongMessage);
    			break;
    		default:
    			throw new Error("Validate::Length - Length(s) to validate against must be provided!");
    	}
    	return true;
    },
    Inclusion: function(value, paramsObj){
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Must be included in the list!";
      var caseSensitive = (paramsObj.caseSensitive === false) ? false : true;
    	if(paramsObj.allowNull && value == null) return true;
      if(!paramsObj.allowNull && value == null) Validate.fail(message);
    	var within = paramsObj.within || [];
      //if case insensitive, make all strings in the array lowercase, and the value too
      if(!caseSensitive){ 
        var lowerWithin = [];
        for(var j = 0, length = within.length; j < length; ++j){
        	var item = within[j];
          if(typeof item == 'string') item = item.toLowerCase();
          lowerWithin.push(item);
        }
        within = lowerWithin;
        if(typeof value == 'string') value = value.toLowerCase();
      }
    	var found = false;
    	for(var i = 0, length = within.length; i < length; ++i){
    	  if(within[i] == value) found = true;
        if(paramsObj.partialMatch){ 
          if(value.indexOf(within[i]) != -1) found = true;
        }
    	}
    	if( (!paramsObj.negate && !found) || (paramsObj.negate && found) ) Validate.fail(message);
    	return true;
    },
    Exclusion: function(value, paramsObj){
      var paramsObj = paramsObj || {};
    	paramsObj.failureMessage = paramsObj.failureMessage || "Must not be included in the list!";
      paramsObj.negate = true;
    	Validate.Inclusion(value, paramsObj);
      return true;
    },
    
    Confirmation: function(value, paramsObj){
      	if(!paramsObj.match) throw new Error("Validate::Confirmation - Error validating confirmation: Id of element to match must be provided!");
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Does not match!";
    	var match = paramsObj.match.nodeName ? paramsObj.match : document.getElementById(paramsObj.match);
    	if(!match) throw new Error("Validate::Confirmation - There is no reference with name of, or element with id of '" + paramsObj.match + "'!");
    	if(value != match.value){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    Acceptance: function(value, paramsObj){
      	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Must be accepted!";
    	if(!value){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
	Custom: function(value, paramsObj){
		var paramsObj = paramsObj || {};
		var against = paramsObj.against || function(){ return true; };
		var args = paramsObj.args || {};
		var message = paramsObj.failureMessage || "Not valid!";
	    if(!against(value, args)) Validate.fail(message);
	    return true;
	  },
	
   
    now: function(validationFunction, value, validationParamsObj){
      	if(!validationFunction) throw new Error("Validate::now - Validation function must be provided!");
    	var isValid = true;
        try{    
    		validationFunction(value, validationParamsObj || {});
    	} catch(error) {
    		if(error instanceof Validate.Error){
    			isValid =  false;
    		}else{
    		 	throw error;
    		}
    	}finally{ 
            return isValid 
        }
    },
    fail: function(errorMessage){
            throw new Validate.Error(errorMessage);
    },
    
    Error: function(errorMessage){
    	this.message = errorMessage;
    	this.name = 'ValidationError';
    }

}