uncommon way to trigger js

MAP NAME="navmap">
<AREA shape="poly" coords="162,252,225,252,225,315,162,315,162,252" href="\gui\visio gui2.htm">

</MAP>

could this somehow be converted to trigger javascript upon clicking?

<MAP NAME="navmap">
<AREA shape="poly" coords="162,252,225,252,225,315,162,315,162,252" href="\gui\visio gui2.htm" onclick="MyFunction();return false;">
</MAP>