// -----------------------------------------------------------------------------
// Generic Form Validation
//
// Copyright (C) 2000 Jacob Hage - [jacobhage@hotmail.com]
// Distributed under the terms of the GNU Library General Public License
// -----------------------------------------------------------------------------
// Altered by G&G - George Stathis - Gina Theodorly (www.gandg.gr)
//	* added Greek Language Support
//	* added string1 mode (string with only one word)
//	* added afm mode (checks Greek AFM)

// -----------------------------------------------------------------------------
// Initializing script  - setting global variables
// -----------------------------------------------------------------------------
var checkObjects		= new Array(); 	// Array containing the objects to validate.
var errors				= ""; 			// Variable holding the error message.
var returnVal			= false; 		// General return value. The validated form will only be submitted if true.
var language			= new Array(); 	// Language independent error messages!
var selectecLanguage	= "greek";	// Choose between "english", "greek", "dutch", "french", "spanish", "russian", "portuguese"
language.english		= new Array();
language.greek			= new Array();
language.dutch			= new Array();

// Error messages in english:
	language.english.header		= "The following error(s) occured:"
	language.english.start		= "->";
	language.english.field		= " Field ";
	language.english.require	= " is required";
	language.english.min		= " and must consist of at least ";
	language.english.max		= " and must not contain more than ";
	language.english.minmax		= " and no more than ";
	language.english.chars		= " characters";
	language.english.num		= " and must contain a number";
	language.english.email		= " must contain a valid e-mail address";
	language.english.afm		= " must containg a valid AFM";
	language.greek.oneString	= " πρέπει να αποτελείται από μία μόνο λέξη";

// Error messages in greek:
	language.greek.header		= "Παρουσιάστηκαν τα ακόλουθα σφάλματα:"
	language.greek.start		= "->";
	language.greek.field		= " Το πεδίο ";
	language.greek.require	= " είναι υποχρεωτικό";
	language.greek.min		= " και πρέπει να περιέχει τουλάχιστον ";
	language.greek.max		= " και δεν πρέπει να περιέχει πάνω από ";
	language.greek.minmax		= " και όχι περισσότερους από ";
	language.greek.chars		= " χαρακτήρες";
	language.greek.num		= " και πρέπει να περιέχει αριθμό";
	language.greek.email		= " πρέπει να περιέχει μία σωστή διεύθυνση e-mail";
	language.greek.afm		= " πρέπει να περιέχει ένα σωστό ΑΦΜ";
	language.greek.oneString	= " πρέπει να αποτελείται από μία μόνο λέξη";
	
	
// Error messages in Dutch: Thanks to Benjo de Lange <webmaster@bennie-webdesign.com> for translation
	language.dutch.header		= "De volgende fout(en) zitten in het formulier:"
	language.dutch.start		= "->";
	language.dutch.field		= " Veld ";
	language.dutch.require		= " is verplicht";
	language.dutch.min			= " en moet bestaan uit minstens";
	language.dutch.max			= " en moet bestaan uit meer dan";
	language.dutch.minmax		= " en niet meer dan";
	language.dutch.chars		= " karakters";
	language.dutch.num			= " en moet een nummer zijn";
	language.dutch.email		= " moet een geldig e-mail adres zijn.";
	language.dutch.afm		= " moet een geldit AFM ";


// -----------------------------------------------------------------------------
// define - Call this function in the beginning of the page. I.e. onLoad.
//
// n = name of the input field (Required)
// type= string, num, email (Required)
// min = the value must have at least [min] characters (Optional)
// max = the value must have maximum [max] characters (Optional)
// d = (Optional)
// -----------------------------------------------------------------------------
function define(n,type,HTMLname,min,max,d){
	var p;
	var i;
	var x;
	if(!d) d=document;
	if((p=n.indexOf("?"))>0&&parent.frames.length){
    	d=parent.frames[n.substring(p+1)].document;
    	n=n.substring(0,p);
    }
	if(!(x=d[n])&&d.all) x=d.all[n];
	
  	for (i=0;!x&&i<d.forms.length;i++){
  		x=d.forms[i][n];
  	}
	for(i=0;!x&&d.layers&&i<d.layers.length;i++){
		x=define(n,type,HTMLname,min,max,d.layers[i].document);
		return x;		
	}
	
	// Create Object. The name will be "V_something" where something is the "n" parameter above.
	eval("V_"+n+" = new formResult(x,type,HTMLname,min,max);");
	checkObjects[eval(checkObjects.length)] = eval("V_"+n);
}

// -----------------------------------------------------------------------------
// formResult - Used internally to create the objects
// -----------------------------------------------------------------------------
function formResult(form,type,HTMLname,min,max){
	this.form = form;
	this.type = type;
	this.HTMLname = HTMLname;
	this.min  = min;
	this.max  = max;
}

// -----------------------------------------------------------------------------
// validate - Call this function onSubmit and return the "returnVal". (onSubmit="validate();return returnVal;")
// -----------------------------------------------------------------------------
function validate(){
	if(checkObjects.length>0){
		errorObject = "";
	
		for(i=0;i<checkObjects.length;i++){
			validateObject 			= new Object();
			validateObject.form 	= checkObjects[i].form;
			validateObject.HTMLname = checkObjects[i].HTMLname;
			validateObject.val 		= checkObjects[i].form.value;
			validateObject.len 		= checkObjects[i].form.value.length;
			validateObject.min 		= checkObjects[i].min;
			validateObject.max 		= checkObjects[i].max;
			validateObject.type 	= checkObjects[i].type;
			
			//Debug alert line
			//alert("validateObject: "+validateObject+"\nvalidateObject.val: "+validateObject.val+"\nvalidateObject.len: "+validateObject.len+"\nvalidateObject.min,validateObject.max: "+validateObject.min+","+validateObject.max+"\nvalidateObject.type: "+validateObject.type);
			
			// Checking input. If "min" and/or "max" is defined the input has to be within the specific range
			if(validateObject.type == "num" || validateObject.type == "string" || validateObject.type == "string1"){
				if((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val))){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].require+language[selectecLanguage].num+"\n";
				} else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max)){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].require+language[selectecLanguage].min+validateObject.min+language[selectecLanguage].minmax+validateObject.max+language[selectecLanguage].chars+"\n";
				} else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min)){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].require+language[selectecLanguage].min+validateObject.min+language[selectecLanguage].chars+"\n";
				} else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max)){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].require+language[selectecLanguage].max+validateObject.max+language[selectecLanguage].chars+"\n";
				} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].require+"\n";
				}
 				if (validateObject.type == "string1" && validateObject.val.indexOf(" ") != -1) {
						errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].oneString+"\n";
				}
			} else if(validateObject.type == "email"){
				// Checking existense of "@" and ".". The length of the input must be at least 5 characters. The "." must neither be preceding the "@" nor follow it.
				if((validateObject.val.indexOf("@") == -1) || (validateObject.val.charAt(0) == ".") || (validateObject.val.charAt(0) == "@") ||(validateObject.len < 6) || (validateObject.val.indexOf(".") == -1) || (validateObject.val.charAt(validateObject.val.indexOf("@")+1) == ".") || (validateObject.val.charAt(validateObject.val.indexOf("@")-1) == ".")){errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].email+"\n";}
			} else if (validateObject.type="afm") {
				if (!checkAfm(validateObject.val)) {
					errors+=language[selectecLanguage].start+language[selectecLanguage].field+validateObject.HTMLname+language[selectecLanguage].afm+"\n";
				}
				}
		}
	}
	// Used to set the state of the returnVal. If errors -> show error messages in chosen language
	if(errors){
		alert(language[selectecLanguage].header.concat("\n"+errors));
		errors = "";
		returnVal = false;
	} else {
		returnVal = true;
	}
}

function checkAfm(f) {
	var i, fsum=0, n=512, l=0, r;
	if (f.length==9) {
		for (i=0; i<8; i++) {
			n=n/2;
			fsum = fsum + f.substr(i,1)*n;
		}
		l=fsum % 11;
		if (l==10 && f.substr(i,8)==0) 
			r=true;
		else if (l==f.substr(i,8))
			r=true;
		else
			r=false;
	} else 
		r=false;
	return r;
}