function eurocalc(currency){
	if(currency == "EEK"){
		source_field = 'eurocalc_FieldEEK';
		target_field = 'eurocalc_FieldEUR';
		rate = 1/15.6466;
	} else {
		source_field = 'eurocalc_FieldEUR';
		target_field = 'eurocalc_FieldEEK';
		rate = 15.6466;
	}	
	var source_value = parseFloat(document.getElementById(source_field).value.replace(',','.'));
	if(typeof(source_value)=='number' && source_value > 0)document.getElementById(target_field).value = Math.round(source_value*rate*100)/100;	
}