var convertFrom;
var convertTo;
var amount;
var result;


function FormatFloat(pFloat, pDp){
    var m = Math.pow(10, pDp);
    return parseInt(pFloat * m, 10) / m;
}


function convert() {
  
	convertFrom = $('convert-from').options[$('convert-from').selectedIndex];
	convertTo = $('convert-to').options[$('convert-to').selectedIndex];
	amount = parseFloat($('convert-amount').value);
	
	if (isNaN(amount)) {
		$('convert-result').innerHTML = "Valoarea introdusa nu este corecta";
	} else {
		result = parseFloat(convertFrom.value) * amount / parseFloat(convertTo.value);
		$('convert-result').innerHTML = amount + " <b>" + convertFrom.text + "</b> = " + FormatFloat(result,2) + " <b>" + convertTo.text + "</b>";
	}
	
}