function updatePrice() 
{
	
	var price = new Array();
	var add_to_price = 0;
	
			price[1] = new Array();
					price[1][1] = Number();
					price[1][2] = Number(+100);
					price[1][3] = Number(+500);
					price[1][4] = Number(+10000);
				var sel_index = document.getElementById("cart_quantity").elements["id[1]"].selectedIndex;
		var item_id = document.getElementById("cart_quantity").elements["id[1]"].options[sel_index].value;
		if (!isNaN(item_id))
			add_to_price += price[1][item_id];
			price[2] = new Array();
					price[2][8] = Number();
					price[2][7] = Number(+0.1);
					price[2][6] = Number(+10);
					price[2][5] = Number(+15.95);
				var sel_index = document.getElementById("cart_quantity").elements["id[2]"].selectedIndex;
		var item_id = document.getElementById("cart_quantity").elements["id[2]"].options[sel_index].value;
		if (!isNaN(item_id))
			add_to_price += price[2][item_id];
	 
	var calculated_price = Number(original_price)+Number(add_to_price);
	document.getElementById("updatePrice").firstChild.nodeValue = currencyToXTC(calculated_price);
	
	
}
	


function toDecimalPlaces(x, n)
	
{
	
	if (n < 1 || n > 14) return false;
	var e = Math.pow(10, n);
	var k = (Math.round(x * e) / e).toString();
	if (k.indexOf('.') == -1) k += '.';
	k += e.toString().substring(1);
	return k.substring(0, k.indexOf('.') + n+1);
  	
}	
	


function currencyToXTC(str)
	
{
	
	var decimal_point = ',';
	var decimal_places = 2;
	var thousands_point = '.';
	str = toDecimalPlaces(str,decimal_places);
	var predecimal_part = str.substring(0,str.length-decimal_places-1);
	var deicmal_part = str.substr(str.length-decimal_places,decimal_places);
	if(thousands_point != "" && predecimal_part.length > 3){
		var predecimal_temp = predecimal_part;
		var predecimal_part = "";
		for(j = 3; j < predecimal_temp.length ; j+=3){
		  var extrakt = predecimal_temp.slice(predecimal_temp.length - j, predecimal_temp.length - j + 3);
		  predecimal_part = thousands_point + extrakt +  predecimal_part + "";
		}
		var str_first = predecimal_temp.substr(0, (predecimal_temp.length % 3 == 0)?3:(predecimal_temp.length % 3));
		predecimal_part = str_first + predecimal_part;
	  }
	return predecimal_part + decimal_point + deicmal_part;
  	
}	
	


function currencyToJavaScript(str)
	
{
	
	var decimal_places = 2;
	var thousands_point = '.';
	str = str.toString()
	var predecimal_part = str.substring(0,str.length-decimal_places-1);
	var deicmal_part = str.substr(str.length-decimal_places,decimal_places);
	if(thousands_point != "" && predecimal_part.length > 3)
		predecimal_part = predecimal_part.replace(eval('/\\'+thousands_point+'/g'),'');
	return Number(predecimal_part + '.' + deicmal_part);
  	
}