url parameter to open google maps infowindow on load?

i have a series of links to specific addresses on google maps. several of these addresses have markers with an infowindow. is there any query parameter i can add to the urls to automatically open this infowindow on load?

currently i'm my hrefs look like this:

http://maps.google.com/?q=business name 15 main st., c开发者_StackOverflow社区ity, state

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You can do this by adding iwloc=A to the query string. The "A" represents the marker letter on the map.