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2011-08-17T08:01:50.343
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2011-08-17T08:16:45.870
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2011-08-17T08:16:45.870
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<p>I write a javascript version. no Ajax, currency change rates was borrowed from google.</p> <p><strong>HTML Code</strong></p> <pre><code> <select id="currencySelector"> <option value="usd">USD</option> <option value="aud">AUD</option> <option value="eur">EUR</option> <option value="gbp">GBP</option> </select> <div class="currency" data-currencyName="usd">15<span>USD</span></div> <div class="currency" data-currencyName="eur">15<span>EUR</span></div> <div class="currency" data-currencyName="gbp">15<span>BGP</span></div> <div class="currency" data-currencyName="aud">15<span>AUD</span></div> </code></pre> <p><strong>Javascript Code</strong></p> <pre><code>var selector = document.getElementById("currencySelector"); var currencyElements = document.getElementsByClassName("currency"); var usdChangeRate = { AUD: 1.0490, // 1AUD = 1.0490 USD EUR: 1.4407, // 1EUR = 1.4407 USD GBP: 1.6424, USD: 1.0 }; selector.onchange = function () { var toCurrency = selector.value.toUpperCase(); for (var i=0,l=currencyElements.length; i<l; ++i) { var el = currencyElements[i]; var fromCurrency = el.getAttribute("data-currencyName").toUpperCase(); if (fromCurrency in usdChangeRate) { var // currency change to usd fromCurrencyToUsdAmount = parseFloat(el.innerHTML) * usdChangeRate[fromCurrency]; var // change to currency unit selected toCurrenyAmount = fromCurrencyToUsdAmount / usdChangeRate[toCurrency]; el.innerHTML = toCurrenyAmount + "<span>" + toCurrency.toUpperCase() + "</span>"; el.setAttribute("data-currencyName",toCurrency); } } }; </code></pre> <p><strong>Run the code</strong></p> <p>You can run the code above at <a href="http://jsbin.com/ewuyoq/5" rel="nofollow">http://jsbin.com/ewuyoq/5</a> or build your own version <a href="http://jsbin.com/ewuyoq/5/edit" rel="nofollow">http://jsbin.com/ewuyoq/5/edit</a></p>
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1. POJavascript code: dynamically change currencies with dropdown HTML
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1. USwukong
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