mader, самый простой вариант
<img src="http://oi63.tinypic.com/j8cg7o.jpg" alt="hill" usemap="#map">
<map name="map">
<area nohref title="30m" alt="30m" shape="poly" coords="83,62,67,34,81,28,110,36,115,61">
<area nohref title="20m" alt="20m" shape="poly" coords="80,83,37,45,51,16,113,28,134,53,122,79">
<area nohref title="10m" alt="10m" shape="poly" coords="64,97,23,77,11,37,28,11,76,4,136,28,147,60,125,90">
<area nohref title="0m" alt="0m" shape="rect" coords="0,0,150,100">
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