var currencies = new Array();
var currenciesRates = new Array();
function refreshExchangeRateResult() {
	i1 = document.getElementById("er_currency_from").selectedIndex;
	i2 = document.getElementById("er_currency_to").selectedIndex;
	result = parseFloat(document.getElementById("er_input").value) * currenciesRates[i2] / currenciesRates[i1];
	document.getElementById("er_result").value = result;
}
function caculater_init() {
	currencies[0] = "USD-美元";
	currenciesRates[0] = 1;
	currencies[1] = "EURO-欧元";
	currenciesRates[1] = 0.725;
	currencies[2] = "YTL-新里拉";
	currenciesRates[2] = 1.28;
	currencies[3] = "RMB-人民币";
	currenciesRates[3] = 7.54;
}

function caculater_select_options() {
	for (i=0;i<currencies.length;i++) {
		document.write("<option>"+currencies[i]+"</option>");
	}
}

function caculater_set_default() {
	//默认RMB->TRY
	document.getElementById('er_currency_from').selectedIndex = 3;
	document.getElementById('er_currency_to').selectedIndex = 2;
	refreshExchangeRateResult();
}