Handlebars.js first script - Hello World template

<script src="jquery.min.js"></script>
<script src="handlebars-1.0.0.beta.6.js"></script>

<span id="content-placeholder" class="text_js"></span>

<script id="template_1" type="text/x-handlebars-template">
 <div style="border: 1px solid black; width: 350px">
 <i>{{hello_world}}</i><br>
 {{test_var}}
 </div>
</script>

<script>

 var source   = $("#template_1").html();
 var template = Handlebars.compile(source);
 var context = {hello_world: "Hello world!", test_var: "Content generated using Handlebars.js template."};
 var html    = template(context);
 $("#content-placeholder").html(html);

</script>