When You Want To Convert Currency From One Currency To Another, You Need To Use A Currency Conversion. Their Are Many APIs Which Allows To Convert Currency. In This Example I Will Demonstrate You To Use Yahoo API To Convert Currency.
Below Html Pages Uses The Yahoo API To Get The Currency Rate,
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.4/jquery.mobile-1.4.4.min.css">
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
function getRate(){
var sFrom = $("#sFromCurrency" ).val();
var sTo = $("#sToCurrency" ).val();
var url = "http://query.yahooapis.com/v1/public/yql?q=select%20rate%2Cname%20from%20csv%20where%20url%3D%27http%3A%2F%2Fdownload.finance.yahoo.com%2Fd%2Fquotes%3Fs%3D"+sFrom+sTo+"%253DX%26f%3Dl1n%27%20and%20columns%3D%27rate%2Cname%27&format=json";
$.ajax({
url: url,
type: "POST",
async: false,
processData: true,
data: "",
contentType: "application/json",
dataType: "jsonp"
}).done(function (data) {
$("#rate").html(data.query.results.row.rate);
});
}
</script>
</head>
<body>
<div data-role="page" id="pageone">
<div id="CurrencyFrom">
<span>Currency From </span>
<select id="sFromCurrency">
<option value="USD">USD</option>
<option value="GBP">GBP</option>
<option value="EUR">EUR</option>
<option value="LKR">LKR</option>
<option value="AUD">AUD</option>
</select>
</div>
<div id="CurrencyTo">
<span>Currency To </span>
<select id="sToCurrency">
<option value="USD">USD</option>
<option value="GBP">GBP</option>
<option value="EUR">EUR</option>
<option value="LKR">LKR</option>
<option value="AUD">AUD</option>
</select>
</div>
<div>
<input type="button" value="Check Rate" onclick="getRate()">
</div>
<div>
<span>Rate : </span>
<span id="rate">1.00</span>
</div>
</div>
</body>
</html>
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