Onhover txt

Please What I have to do to show different txt when the image is open and another when the image is close?

When the Map is close show text ( click to open)
When the map is open show text (click to close)
Maybe this code ..."if(isclose, showtext(click to open, buttonstyle), showtext(click to close, buttonstyle));"

<plugin name="map" url="imagens/planta.png" keep="true"
align="righttop" x="10" y="10" alpha="1.0" handcursor="false"
scalechildren="true"
onhover="showtext(Clique para alterar tamanho, txtcliente);"
width="370"
height="300"
onclick="action(closemap);"
/>

Thank you