Constant Contact Event Page Customization

I would like to customize my Constant Contact Event page to to load external html pages from a button ON-Click located in a <DIV> on the page into another <DIV> on the same page. The external page being loaded is coming from a domain outside the constant contact platform. Here is a URL of one of my event pages, http://www.vincentekuban.info. The Interac Icon on the left column, upon a click must load an external html page in the <DIV> section titled Steps in the middle of the page. By repeatedly clicking on the Interac icon the external page that loaded in the Steps <DIV> should toggle between show and hide. Project must be completed in no more than 5 days.