Marker JPG's showing when map opens

I have created numerous markers with an associated JPG for each. When the map is opened in a Chrome or IOS browser, all of the JPGs are opened and tiled on the map as it opens. In Internet Explorer, a single marker JPG is automatically opened and shown. How do I get the marker JPGs not to show until after a marker is selected?

Here is the code that “add media” inserted for one of the markers:

“<img class=”size-medium wp-image-563″ src=”https://presspi/wp-content/uploads/2015/12/StandardD10B232P25-1-300×194.jpg&#8221; alt=”Norman Service Station. 4601 Troost” width=”300″ height=”194″ /> Norman Service Station. 4601 Troost”

Thanks

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