Update README.md

Made the 2nd sample match the first sample.

Author: markvantilburg

README.md

@@ -13,14 +13,17 @@ new QRCode(document.getElementById("qrcode"), "http://jindo.dev.naver.com/collie
 or with some options
 
 ```
-var qrcode = new QRCode("test", {
+<div id="qrcode"></div>
+<script type="text/javascript">
+var qrcode = new QRCode(document.getElementById("qrcode"), {
 	text: "http://jindo.dev.naver.com/collie",
 	width: 128,
 	height: 128,
 	colorDark : "#000000",
 	colorLight : "#ffffff",
 	correctLevel : QRCode.CorrectLevel.H
 });
+</script>
 ```
 
 and you can use some methods