jQuery QRify Plugin

jquery.qrify.js

// BEGIN jquery.qrify.js
(function( $ ) {
    $.fn.qrify = function( options ) {
        options = $.extend( {}, $.fn.qrify.defaultOptions, options );
        return this.each( function() {
            var $anchor = $( this ),
                source = "//chart.googleapis.com/chart?chs=" +
                    options.width + "x" + options.height +
                    "&cht=qr&chld=|0&chl=";
        
            $( "<img />", {
                src: source + encodeURIComponent( $anchor.attr( "href" ) ),
                click: function() { alert( "SCAN ME!" ); }    
            }).insertAfter( $anchor );
        });
    };
    $.fn.qrify.defaultOptions = { width: 150, height: 150 };
}( jQuery ));
// END jquery.qrify.js

// BEGIN main.js
$( function() {
    // override the global defaults 
    $.fn.qrify.defaultOptions.width = 300;
    $.fn.qrify.defaultOptions.height = 300;
    
    // specific options to override defaults
    $( "a" ).qrify({ width: 200, height: 200 });
});
// END main.js