Google Maps is great, but some hacks are needed

I’m currently working on an AJAX-driven site also using Google Maps’ externally accessible API. But I have as several others been frustrated about the fact, that the GMarkerManager-class does not contain a clearMarkers method. So I combined the open-sourced source with the latest closed-source release, and mashed stuff up like this:

// hack GMarkerManager to contain a method for clearing all markers
GMarkerManager.prototype.clearMarkers = function() {
	var me = this;
	//
	// clear currently shown
	if (me.Wd > 0) {
		me.Id(me.K, me.Kd);
	}
	// 
	// reset arrays
	var maxZoom = me.df;
	var maxWidth = 256;
 	for (var zoom = 0; zoom < maxZoom; ++zoom){
	    me.ed[zoom] = [];
	    me.oc[zoom] = 0;
	    me.gc[zoom] = Math.ceil(maxWidth/me.Ec);
	    maxWidth <<= 1;
	 }
	me.refresh();
}