Ok, there's a few problems going on.
First, this line:
needs to be moved so that it is just before the closing </html> tag.
it also needs to have the path adjusted to match the other js references and look in the correct place:
Your first link is working, the middle is not because you haven't added an address into it.
the third one doesn't work because of case sensitivity.
onclick="wagmp_map_2_obj.getPointByAddress('2405 Niagara Parkway').marker.openInfoWindowHtml(wagmp_map_2_obj.getPointByAddress('2405 Niagara Parkway').address.infowindowtext);"