call google maps infowindows from parentframe, geocoding API

my customized googlemap (without API) looks like this: [login to view URL] I will locate it inside an iframe.!!!!!!!!!!!! I will not want to use API !!!!!!!!! I am looking for a script to click upon the list of infowindows (already provided by googlemaps as a list! That list is displayed at the leftside pane of my googlemap. Any click upon any of those buttons in that list already exactly does what I want it to do ) I would like to click() through that list FROM THE PARENT FRAME ! using only one button. I would want to call it " NEXT-Button". As I cannot manipulate the content inside the iframe with the googlemap in it , ... This button would have to be located in the parent-window of course... Any Idea on how to realize this without API? i would like the infowindows to popup and fall centered into place, one after the other, clicking upon only one button called "next". verymuch preferrably without google api. actually all i need is already provided... the List is there inside the googlemap ... the only thing missing is an appropriate new way to read the list out. So to be as percise as I can: the script shall find out which infowindow is currently active inside the iframe.... and then find that infowindow inside the existing list of infowindow-buttons (at the left inside the googlemap) and then trigger a click upon the next infowindow-button inside the iframe ... I wonder if this will be possible buy the use of javascript? or a PHP-Script? Stefan