function getkey(e)
{
if (window.event)
   return window.event.keyCode;
else if (e)
   return e.which;
else
   return null;
}

//validare caracter introdus
function validateInputChar(e, goods)
{
var key, keychar;
key = getkey(e);
if (key == null) return true;

// get character
keychar = String.fromCharCode(key);
keychar = keychar.toLowerCase();
goods = goods.toLowerCase();

// check goodkeys
if (goods.indexOf(keychar) != -1)
	return true;

// control keys
if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )
   return true;

// else return false
return false;
}



function convertCurrency()
{
    var currentInputCurrency;
    var currentOutputCurrency;
    var currencySymbol;
	var flag1
    //for various conversion
    var tempString;
    //for current input sum
    var sum;
    //converted value
    var convertedValue;
	var vatValue;
	var totValue;
	var convertedVatValue;
	var convertedTotValue;
	var t1;
    with(document.sendObject) {
        //computing input value
        if (suma.value == '') suma.value = '1';
		tempString = din[din.selectedIndex].value;
        currencySymbol = tempString.substr(0, 3);
        currentInputCurrency = dinArray[currencySymbol];
		document.getElementById('flag1').src = "/imgs/"+currencySymbol.toLowerCase()+".gif";
        //computing output value
        tempString = inc[inc.selectedIndex].value;
        currencySymbol = tempString.substr(0, 3);
        currentOutputCurrency = inArray[currencySymbol];
		document.getElementById('flag2').src = "/imgs/"+currencySymbol.toLowerCase()+".gif";
        //now we need to fetch the sum to be converted
        sum = parseFloat(suma.value);
		if (document.getElementById('check_tvasum').checked == 1 ) {
			convertedValue = sum * currentInputCurrency / currentOutputCurrency;
			totValue = sum / 1.20;
			vatValue = sum - totValue; 			
			 
			convertedTotValue = convertedValue / 1.20;
			convertedVatValue = convertedValue - convertedTotValue;
		}
		else {
			convertedValue = sum * currentInputCurrency / currentOutputCurrency;
			vatValue = sum * 0.20; 
			totValue = sum + vatValue;
			convertedVatValue = convertedValue*0.20; 
			convertedTotValue = convertedValue + convertedVatValue;	
		}
		
		sumtva.value = vatValue.toString();
        result.value = convertedValue.toString();
		sumtotal.value = totValue.toString();
        rezulttva.value = convertedVatValue.toString();
		rezulttotal.value = convertedTotValue.toString();
		
				
    }
}

function ShowCurrencyFlag()
{
    var tempString;	
	var currencySymbol;
	
    with(document.historybetween) {
      tempString =  valuta[valuta.selectedIndex].value;
	  currencySymbol = tempString.substr(0, 3);
      document.getElementById('flag1').src = "/imgs/"+currencySymbol.toLowerCase()+".gif";
    }
	document.submitform.valuta.value = currencySymbol;
}

function ChangeSum () {
	if (document.getElementById('check_tvasum').checked == 1 ) {
	  document.getElementById('s1').style.display = 'none';
	  document.getElementById('s2').style.display = 'block';
	  document.getElementById('s3').style.display = 'none';
	  document.getElementById('s4').style.display = 'block';
	  document.getElementById('d1').style.display = 'none';
	  document.getElementById('d2').style.display = 'block';
	  document.getElementById('d3').style.display = 'none';
	  document.getElementById('d4').style.display = 'block';	  
	}
	else {
	  document.getElementById('s1').style.display = 'block';
	  document.getElementById('s2').style.display = 'none';
	  document.getElementById('s3').style.display = 'block';
	  document.getElementById('s4').style.display = 'none';
	  document.getElementById('d1').style.display = 'block';
	  document.getElementById('d2').style.display = 'none';
	  document.getElementById('d3').style.display = 'block';
	  document.getElementById('d4').style.display = 'none';	  
	}
	convertCurrency();
}