simple popup image

Hi, I am trying to make a simple popup image of a floor plan from an icon that appears within a tour. The icon is displayed permanently.

Can anyone give me any help?

I look forward to hearing from you.

Hi KiboOst, thanks for this. I have it semi working but I must be doing something slightly wrong. Here is the code I have:

<layer name="fbbtn" url="fp.png" scale="1.00" align="topright" x="220" y="10" keep="true" onclick="switch(layer[floorplan].visible);" />

<layer name="floorplan" url="floorplan/tsr0202fp.jpg" scale="0.50" align="center" visible="false" />

As it stands with the code above does not work correctly for me. If I add visible="true" to the floorplan layer I see the floorplan and the button "fbbtn" closes it when clicked but naturally by default I do not want the floorplan to show until the buttin is clicked.

Any ideas?