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

var activeForm = 0;

function initialize()
{
	document.chooseForm0.depositAmount.value = 5000;
	document.chooseForm0.depositRate.value=0.5;
	document.chooseForm0.depositTerm.value=90;
	document.chooseForm0.depositCapitalization.value=0;

	recalculate(document.chooseForm0.depositAmount,document.chooseForm0);
}

function recalculate(field,form)
{
	if(field.type=="text")
	{
		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;
	}
	
	var amount = parseFloat(form.depositAmount.value);
	var rate = form.depositRate.value/100;
	var term = form.depositTerm.value/360;
	var cap = form.depositCapitalization.value;
	if(cap==0) cap=term*360;	
	var capy = 360/cap;
	
	var interests = round(amount * Math.pow(1 + rate/capy,term*capy) - amount,2);
	form.resultInterests.value = interests.toMoney(2,'.',' ');
	form.resultAmount.value = (amount + interests).toMoney(2,'.',' ');
	form.resultNett.value = round(amount + interests - round(interests*0.19,2),2).toMoney(2,'.',' '); 
	form.resultEfectiveRate.value = round(100 * (Math.pow(1 +(rate/capy),capy) - 1),2).toFixed(2)+"%";
}

function activateForm()
{    
    activeForm++;
	
	document.getElementById("deposit_view_"+activeForm).style.removeProperty("display");
	
	document.forms[activeForm].depositAmount.value = document.forms[activeForm-1].depositAmount.value;
	document.forms[activeForm].depositRate.value = document.forms[activeForm-1].depositRate.value;
	document.forms[activeForm].depositTerm.value = document.forms[activeForm-1].depositTerm.value;
	document.forms[activeForm].depositCapitalization.value = document.forms[activeForm-1].depositCapitalization.value;
	
	recalculate(document.forms[activeForm].depositAmount,document.forms[activeForm]);
	
	if(activeForm==document.forms.length-1)
	{		
		document.getElementById("deposit_view_activation").style.display = "none";
	}
	
	return false;
}

function selectInput(field)
{
	addClass(field,"input_selected");
	
	for(var i = 0; i < field.form.elements.length; i++)
   {
		var currentElement = field.form.elements[i];
		
		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) : ''); 
}