Highslide onclick code in Blogger Template editor

You can’t put regular Highslide onclick code directly between the body tags in the Blogger Template editor because the Template editor will transform the ' and " to something else.
Write your code and go to this page - HTML Encoder.
Paste your code and click the Encode button. Paste the transformed code in the Template editor.

Gallery with thumsbstrip using regular onclick

objectType: 'iframe' using regular onclick

Content in iframe

Highslide JS - linked image

This image is using hs.isUnobtrusiveAnchor