Unobtrusive Anobii badge

gistfile1.js

var BPs = {};
var AnobiiBadge = (function(){
	var BADGE_URL = 'http://widgets.anobii.com/badge_result?settingId=4dd4b3916a743731';
	var bodyElm = document.getElementsByTagName('body')[0];
	return {
		init: function(){
			var script 	= document.createElement('script');
			script.src 	= BADGE_URL;
			script.type = 'text/javascript';
			bodyElm.appendChild(script);

			if( script.readyState ){
				script.onreadystatechange = function(){
					if( script.readyState = 'complete' ) {
						if(BPs['4dd4b3916a743731']) AnobiiBadge.install( BPs['4dd4b3916a743731'].items );
					}
				}
			}else{
				script.onload = function(){
					if(BPs['4dd4b3916a743731']) AnobiiBadge.install( BPs['4dd4b3916a743731'].items );
				}
			}
		},
		install: function(jsonData){
			var books = document.createElement('dl');
			var inner = '';
			for(var data, i = 0, max = jsonData.length; i<max; i++){
				data = jsonData[i];
				inner += '<dt><a href="'+data.link+'"><img src="'+data.image+'" alt=""></a></dt>';
				inner += '<dd><strong>'+data.title+'</strong> '+data.subtitle+'</dd>';
				inner += '<dd class="author">'+data.author+'</dd>';
			}
			books.innerHTML = inner;
			bodyElm.appendChild( books );
		}
	}
})();

AnobiiBadge.init();