qrcode.js for the bookmarklet

qrcode.js

// bookmarklet: qrcode
// 
// javascript:void((function(d){var s=BOOKMARKLETSCRIPT=d.createElement('script');s.type='text/javascript';s.src='https://raw.github.com/gist/1266971/b5e0748c51dd0ffdf4a1abb00d14409a8220b7c2/qrcode.js';d.getElementsByTagName('head')[0].appendChild(s);})(document));
//
try {
(function(d){
     var body = d.getElementsByTagName('body')[0];
     var add = function(args) {
         var target = args.target || body;
         var elem = d.createElement(args.tag || 'div');
         var style = args.style || {}, id;
         for (id in style) {
             elem.style[id] = style[id];
         }
         target.appendChild(elem);
         args.init && args.init(elem);
         return elem;
     };
     add({ style: {
               position: 'fixed',
               left: '0px',
               top: '0px',
               width: '100%',
               height: '100%',
               zIndex: '9999'
           },
           init: function(backpanel) {
               backpanel.onclick = function(event) {
                   backpanel.parentNode.removeChild(backpanel);
               };
               add({ target: backpanel,
                     style: {
                         position: 'fixed',
                         left: '0px',
                         top: '0px',
                         width: '100%',
                         height: '100%',
                         'filter': 'alpha(opacity=50)',
                         '-moz-opacity': '0.5,',
                         opacity: '0.5',
                         backgroundColor: '#000'
                     }
                   });
               var w = 300, h = 300;
               var l = (backpanel.clientWidth - w) / 2;
               var t = (backpanel.clientHeight - h) / 2;
               add({ target: backpanel,
                     style: {
                         position: 'fixed',
                         left: l + 'px',
                         top: t + 'px',
                         width: w + 'px',
                         height: h + 'px',
                         backgroundColor: '#fff'
                     },
                     init: function(div) {
                         add({ target: div,
                               tag: 'img',
                               style: {
                                   width: '100%',
                                   height: '100%'
                               },
                               init: function(img) {
                                   img.src = 'http://chart.apis.google.com/chart?chs=150x150&cht=qr&chl='+encodeURIComponent(window.location.href);
                               }
                             });
                         add({ target: div,
                               style: {
                                   color: '#fff',
                                   'text-align': 'right',
                                   'font-size': '75%'
                               },
                               init: function(ver) {
                                   ver.innerHTML = 'bookmarklet:qrcode v0.0.5';
                               }
                             });
                     }
                   });
           }
         });
 })(document);
} finally {
    if (typeof BOOKMARKLETSCRIPT !== 'undefined') {
        BOOKMARKLETSCRIPT.parentNode.removeChild(BOOKMARKLETSCRIPT);
        delete BOOKMARKLETSCRIPT;
    }
}