HTML

The issue causes bubbling in DOM and  pass all the events to Google Maps Event handler. Click, DoubleClick, MouseUp/Down, etc… I had the problems with input boxes and made this up as temporary solution. (I tried canceling bubbling from overlay DIV too, It didn’t work)

$("input, textarea").click(function(ev) {
    $(this).focus();

    tws_cancelEvent(ev);
});

or

var _input = document.getElementsByTag('input');
for ( ... ) {
     /* bind the click event for each item */
}

this CancelEvent function is generic. working for all browsers including old  age ones.

/*
 * ----------------------------------------------------------------------------
 * tws_cancelEvent
 * --------------------------------------------------------------------------
 */
var tws_cancelEvent = function(event) {
    /* if no event is passed, pull the event from the window object */
    var ev = (event || window.event);

    if (ev) {
        /*
         * this cancels the bubble in order to prevent the event from
         * bubbling up the dom chain (eg: OOB script won't log link
         * click)
         */
        ev.cancelBubble = true;

        if (ev.stopPropagation) {
            ev.stopPropagation();
        }

        /*
         * this sets the return value to false and stops the default
         * action from occurring (eg: clicks on links won't navigate)
         */
        ev.returnValue = false;

        if (ev.preventDefault) {
            ev.preventDefault();
        }
    }

    /* return false in case we want to use in an onclick property */
    return false;
};