Set callout position

Hello.

There are any ways to set position for callout popup window?

I set callout for map-zone in own map on image:

<img alt="189968c86.jpg" src="89968c86.jpg" usemap="#myMap" width="604" height="403" /><map name="myMap" id="myMap"><area shape="rect" coords="139,85,327,211" onmouseover="OpenCallout();" onmouseout="CloseCallout();" id="m1"/></map>

And callout not appear wherever the mouse, and somewhere on the image.