jsviews demo

action.js

var image = {thumbnail: "/path/to/thumbnail", caption: "My really awesome image"}

$('thingtoactivateon').click(function() {
     $($('#photoDetailsEdit').render(image)).dialog()
})

head.html

<script src='jsviews/jsrender.js'></script>

template.html

<script id="photoDetailsEdit" type="text/x-jquery-tmpl">
  <div>
    <p><img src='{{=thumbnail}}'></p>
    <p><textarea name='caption'>{{=caption}}</textarea></p>
    <p><button>Ok</button></p>
  </div>
</script>