// -----------------------------------------------------------------------------
// 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 selectedLanguage	= "english";	// Choose between "english", "danish", "dutch", "french", "spanish", "russian", "portuguese"
language.english		= 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.date		= " must contain a valid date (dd/mm/yyyy)";
	//language.english.date		= " must contain a valid date";
	//language.english.date		= " must contain a valid date (mm/dd/yyyy)";
// -----------------------------------------------------------------------------
// 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)
// HTMLname = Name of the Field (Required)
// min = the value must have at least [min] characters (Optional)
// max = the value must have maximum [max] characters (Optional)
// d = Document Object (Optional)
/*----------------------------------------------------------------------------
define('field1','string','Apple');				Required
define('field2','string','Peach',4);			Required - minimum 4 characters
define('field3','string','Cherry',null,8);		Required - maximum 8 characters
define('field4','string','Melon',4,8);			Required - minimum 4 characters -maximum 8 characters
define('field5','num','Banana');				Required - Must be a numeric
define('field6','num','Grape',3);				Required - Must be a numeric - minimum 3 digits
define('field7','num','Carot',null,6);			Required - Must be a numeric - maximum 6 digits
define('field8','num','Sugar',4,6);				Required - Must be a numeric - minimum 4 digits - maximum 6 digits
define('field9','email','Fruit')				Required - Valid e-mail
define('field10','date','Date',1)				Required - Valid Date
define('field11','date','Date')					Optional - Valid Date
-----------------------------------------------------------------------------*/
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"){
				if((validateObject.type == "num" && validateObject.len <= 0) || (validateObject.type == "num" && isNaN(validateObject.val))){errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+language[selectedLanguage].num+"\n";
				} else if (validateObject.min && validateObject.max && (validateObject.len < validateObject.min || validateObject.len > validateObject.max)){errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+language[selectedLanguage].min+validateObject.min+language[selectedLanguage].minmax+validateObject.max+language[selectedLanguage].chars+"\n";
				} else if (validateObject.min && !validateObject.max && (validateObject.len < validateObject.min)){errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+language[selectedLanguage].min+validateObject.min+language[selectedLanguage].chars+"\n";
				} else if (validateObject.max && !validateObject.min &&(validateObject.len > validateObject.max)){errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+language[selectedLanguage].max+validateObject.max+language[selectedLanguage].chars+"\n";
				} else if (!validateObject.min && !validateObject.max && validateObject.len <= 0){errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+"\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[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].email+"\n";}
			} else if(validateObject.type == "date"){
				if(validateObject.min && validateObject.len <= 0) {errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].require+"\n";
				} else if (validateObject.len > 0) if(!dateFormatOk(validateObject.val,"/")) {errors+=language[selectedLanguage].start+language[selectedLanguage].field+validateObject.HTMLname+language[selectedLanguage].date+"\n";}
			}
		}
	}
	// Used to set the state of the returnVal. If errors -> show error messages in chosen language
	if(errors){
		alert(language[selectedLanguage].header.concat("\n"+errors));
		errors = "";
		returnVal = false;
	} else {
		returnVal = true;
	}
}
function isdate(pDay, pMonth, pYear){
	int_day=parseInt(pDay,10);
	int_month=parseInt(pMonth,10);
	int_year=parseInt(pYear,10);
	int_year_size=pYear.length;
	
	//checking whole date format
	if(int_day>0 && int_day<32 && int_month>0 && int_month<13 && int_year_size>3)
	{
		if(int_month==2)
		{
			if(int_year%4==0 && (int_year%100!=0 || int_year%400==0)){return (int_day<=29)?true:false}
			else{return (int_day<=28)?true:false}
		}
		else
		{
			if((int_month<8 && int_month%2!=0) || (int_month>7 && int_month%2==0))
			{
				if(int_day<=31)
				{
					return true
				}
				else
				{
					return false
				}	
			}
			else
			{
				if (int_day<=30)
				{
					return true
				}
				else
				{
					return false
				}	
			}
		}
	}
	else 
	{
		return false
	}
}
function explodeArray(item,delimiter) {
  tempArray=new Array(1);
  var Count=0;
  var tempString=new String(item);
  while (tempString.indexOf(delimiter)>0) {
    tempArray[Count]=tempString.substr(0,tempString.indexOf(delimiter));
    tempString=tempString.substr(tempString.indexOf(delimiter)+1,tempString.length-tempString.indexOf(delimiter)+1); 
    Count=Count+1
  }
  tempArray[Count]=tempString;
  return tempArray;
}
function dateFormatOk(pCompoundDate, pDelimiter){
	dateArray = explodeArray(pCompoundDate, pDelimiter);
	date_day = dateArray[0];
	date_month = dateArray[1];
	date_year = dateArray[2];
	
	if(!(isNaN(date_day) || isNaN(date_month) || isNaN(date_year))) {
		return(isdate(date_day, date_month, date_year));
	}
	else
	{
		return(false);		
	};
}