I had a similar problem and used something like this:
<style> .overlay { background:transparent; position:relative; width:640px height:480px; top:480px; margin-top:-480px;} </style> <html> <div class="overlay" onClick="style.pointerEvents='none'"></div> <iframe src="https://mapsengine.google.com/map/embed?mid=some_map_id" width="640" height="480"></iframe> </html>
The div spans the map, preventing pointers from hitting it. If you click on the div, it will become transparent to pointer events, activating the map.
vamin
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