function round(value,precision)
{
	var exp = Math.pow(10,precision);
	
	return Math.round(value*exp)/exp;
}

var initialized = false;

function initialize()
{
	document.chooseForm.numberDecimal.value = new Date().getFullYear();
	
	recalculate(document.chooseForm.numberDecimal);
	
	initialized = true;
}

function recalculate(field)
{
	var form = field.form;
	
	if(field.id=="numberRoman")
	{
		var numberRegExp = new RegExp("^[IVXLCDM]*$");		
		if(!numberRegExp.test(field.value))
			field.value = field.value.replace(/[^IVXLCDM]*/ig,'');		
		
		form.numberDecimal.value = fromRoman(form.numberRoman.value);
	}

	if(field.id=="numberDecimal")
	{
		if(field.value.indexOf(',')>0)
			field.value = field.value.replace(',','.');

		var numberRegExp = new RegExp("^[0-9\.,]*$");		
		if(!numberRegExp.test(field.value))
			field.value = field.value.replace(/[^0-9\.,]*/ig,'');	
	
		//check for double decimal separator
		var firstSep = field.value.indexOf(".");
		var secondSep = firstSep>0?field.value.indexOf(".",firstSep+1):-1;
		if(firstSep>0 && secondSep>firstSep)
		{
			field.value = field.value.substring(0,secondSep);
		}
	
		if(field.value[field.value.length-1]=='.')
			return;
		
		if(field.value>4999)
		{
			form.numberRoman.value = "zbyt duża liczba";
			return;
		}
		
		form.numberRoman.value = toRoman(form.numberDecimal.value);		
	}

	if(initialized)
		gTrackEvent("roman","recalculate",field.id);
}

var roman           = new Array( "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I");
var romanOccurrence = new Array(   4,    1,   1,    1,   3,    1,   1,    1,   3,    1,   1,    1,   3);
var romanSkip       = new Array(   0,    3,   1,    1,   0,    3,   1,    1,   0,    3,   1,    1,   0);
var decimal = new Array(1000,  900, 500,  400, 100,   90,  50,   40,  10,   9,    5,    4,   1);

function toRoman(number)
{
  
	var result = "";
	
	for(var i=0; i<roman.length; i++)
		while (number >= decimal[i]) 
		{
      	number -= decimal[i];
      	result += roman[i];
    	}
	
	return result;
}

function fromRoman(romanNumber)
{
	var result = 0;	
	romanNumber = romanNumber.toUpperCase();
	
	for(var i=0; i<roman.length; i++)
	{
		var occurrence = 0;
		while (romanNumber.startsWith(roman[i])) 
		{
			occurrence++;
			if(occurrence>romanOccurrence[i])
				return "błędna liczba";
				
      	romanNumber = romanNumber.substring(roman[i].length);
      	result += decimal[i];
    	}
    	if(occurrence>0) i+= romanSkip[i];
	}
	if(romanNumber.length>0)
		return "błędna liczba";	
	
	return result;
}

function selectInput(field)
{
	addClass(field,"input_selected");
	
	for(var i = 0; i < document.forms.length; i++)	
		for(var j = 0; j < document.forms[i].elements.length; j++)
   	{
			var currentElement = document.forms[i].elements[j];
		
			if(currentElement == field)
				continue;
			
			removeClass(currentElement,"input_selected");
		}
}

function addClass(item, classname) 
{
    var obj = item
    if (typeof item=="string") {
        obj = document.getElementById(item)
    }
    obj.className += " " + classname
}

function removeClass(item, classname) 
{
    var obj = item
    if (typeof item=="string") {
        obj = document.getElementById(item)
    }
    var classes = ""+obj.className
    while (classes.indexOf(classname)>-1) {
        classes = classes.replace (classname, "")
    }
    obj.className = classes
}

Number.prototype.toMoney = function(decimals, decimalSeparator, thousandsSeparator)
{ 
   var n = this;
   c = isNaN(decimals) ? 2 : Math.abs(decimals);
   d = decimalSeparator || '.';
   t = (typeof thousandsSeparator === 'undefined') ? ' ' : thousandsSeparator;
   sign = (n < 0) ? '-' : '',

   i = parseInt(n = Math.abs(n).toFixed(c)) + '', 
   j = ((j = i.length) > 3) ? j % 3 : 0; 

   return sign + (j ? i.substr(0, j) + t : '') + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : ''); 
}

String.prototype.startsWith = function (str)
{
    return this.indexOf(str) == 0;
};