Código HTML:
<form name="form_alta" id="form_alta" action="?accion=Alta" method="post"> .... campos... <form action="" name="formmaps" id="formmaps"> <input type="text" style="width:500px" name="address" value="güemes 4700, buenos aires" /> <input type="button" value="¡Buscar!" onclick="showAddress(document.formmaps.address.value); return false"/> Lat.:<input type="text" style="width:180px" id="f_latitud" name="f_latitud" value="" /> Long.:<input type="text" style="width:180px" id="f_longitud" name="f_longitud" value="" /> </form><!-- cierro el formmaps --> ... campos ... <input type="submit" name="button2" id="button2" value=" Alta " /><!-- envia el form_alta --> </form><!-- cierro el form_alta-->