HTML karte onmouseover ?

[gl123]

Hallo
ich würd gern es so haben das wenn man auf die einzlnen kontinente mit der maus fährt
dass das dann blau der kontinente auf dem man ist blau wird

<img src="weltkarte.gif" id="imgWeltkarte" alt="" usemap="#weltkarte" border="0" height="235" width="400">
<map name="weltkarte">
    <area alt="Amerika" shape="poly" coords="94,129,72,123,55,95,55,80,44,63,17,73,17,68,22,62,26,39,51,37,58,42,67,37,85,24,100,27,123,30,132,46,129,58,135,68,139,75,137,86,123,87,111,98,107,109,112,116,124,117,122,126,102,120" href="amerika.html" target="c_add_nav" onclick="enableContinent('na')" onmouseover="highlightContinent('na')" onmouseout="dehighlightContinent()">
    <area alt="Amerika" shape="poly" coords="126,222,114,223,108,202,113,173,100,156,98,142,102,132,114,126,121,129,129,131,132,136,138,139,139,144,156,150,152,162,150,174,141,178,136,190,132,195,124,202,123,212,122,218" href="amerika.html" target="c_add_nav" onclick="enableContinent('sa')" onmouseover="highlightContinent('sa')" onmouseout="dehighlightContinent()">
    <area alt="Afrika" shape="poly" coords="184,96,172,111,172,127,180,140,190,140,196,137,201,140,201,148,206,154,202,171,212,192,226,191,232,179,250,179,252,161,240,158,239,149,254,132,250,125,244,128,227,102,209,100,204,94" href="afrika.html" target="c_add_nav" onclick="enableContinent('af')" onmouseover="highlightContinent('af')" onmouseout="dehighlightContinent()">
    <area alt="Australien" shape="poly" coords="316,171,317,192,328,190,335,187,342,191,346,197,350,204,376,209,390,194,387,188,366,177,356,158,366,156,357,147,340,142,340,150,346,152,341,157,327,163,326,168" href="australien.html" target="c_add_nav" onclick="enableContinent('oz')" onmouseover="highlightContinent('oz')" onmouseout="dehighlightContinent()">
    <area alt="Europa" shape="poly" coords="228,51,214,67,216,89,208,94,191,94,180,97,178,84,182,77,175,70,188,56,195,65,197,46,216,36,232,39" href="europa.html" target="c_add_nav" onclick="enableContinent('eu')" onmouseover="highlightContinent('eu')" onmouseout="dehighlightContinent()">

    <area alt="Asien" shape="poly" coords="238,43,254,39,261,32,268,33,278,27,292,23,302,27,305,31,324,31,353,35,385,44,384,58,368,58,364,63,364,71,356,74,346,61,342,64,348,75,350,98,335,101,328,96,329,109,333,126,331,142,324,158,296,149,298,124,290,118,283,136,270,130,266,115,256,112,251,123,243,124,224,97,215,92,219,86,215,67" href="asien.html" target="c_add_nav" onclick="enableContinent('as')" onmouseover="highlightContinent('as')" onmouseout="dehighlightContinent()">
</map>

hilfe

bei http://www.ritz-pumpen.de/de/content_international/content_international.php denen geht das