var qrcode = null;
var qrtext = null;
function init() {
	qrtext = document.getElementById("qrtext");
	qrcode = new QRCode(document.getElementById("qrcode"), {
		correctLevel : QRCode.CorrectLevel.L,
		colorDark: '#333',
		colorLight: '#f0f0f0'
	});
	qrtext.focus();
	parseLocation();
}
function parseLocation() {
	var term = window.location.search || window.location.hash;
	if(term.length > 1) {
		qrtext.value = decodeURIComponent(term.substring(1));
		makeCode(qrtext);
	}
}
function makeCode (input) {
	if (!input.value) {
		qrcode.clear();
		input.focus();
		return;
	}
	
	qrcode.makeCode(input.value);
}