filter:alpha på et imagemap?

Hej!

Jeg har et imagemap, kan jeg bruge filter:alpha og ændre opacity når man kører musen over et område?

Og hvis ja, hvordan?

Her er mit kæmpe imagemap:

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<area alt="Bornholms Amt" shape="poly" coords="351,9,347,21,346,38,352,44,354,43,369,52,376,53,381,49,380,46,385,38,384,32,373,26,369,21,364,20" href="bh_amt">
<area alt="Viborg Amt" shape="poly" coords="153,173,153,184,160,187,160,203,151,210,119,220,105,220,89,197,89,186,90,177,107,159,114,157,120,149,135,149,145,168" href="vb_amt">
<area alt="Ringkøbing Amt" shape="poly" coords="33,143,54,171,75,175,77,177,90,177,89,197,104,218,104,224,110,228,109,232,120,239,120,243,118,244,109,241,98,247,98,254,86,256,86,266,83,270,74,269,71,274,70,279,66,281,58,275,50,275,50,284,43,282,41,284,34,277,31,280,23,277,17,242,21,220,22,169" href="rk_amt">
<area alt="Århus Amt" shape="poly" coords="241,194,229,181,206,184,192,173,194,166,193,156,180,157,178,155,162,162,161,172,152,173,153,183,161,188,161,202,147,211,118,221,103,219,103,224,110,228,110,232,122,239,121,245,132,249,142,246,143,240,159,246,159,254,173,253,175,255,182,276,188,266,188,245,184,237,185,230,200,217,204,219,204,223,194,230,198,234,204,232,206,233,204,238,207,243,211,239,209,232,214,224,218,228,217,233,223,238,225,225,239,209,239,201" href="ah_amt">
<area alt="Vejle Amt" shape="poly" coords="141,331,135,330,123,338,114,336,109,330,116,313,106,303,105,288,86,266,86,255,96,255,99,253,99,247,110,241,134,249,142,247,143,240,160,247,159,253,161,255,173,253,182,275,182,279,173,271,161,276,157,276,172,279,168,287,172,290,167,294,170,297,153,301,131,296,143,301,146,306,154,307,147,317,146,322,140,323,131,322,130,325" href="vejle_amt">
<area alt="Ribe Amt" shape="poly" coords="23,275,31,281,34,278,41,284,45,282,49,283,50,275,61,276,65,281,71,277,73,268,82,270,86,266,105,289,107,303,117,314,111,332,109,330,91,331,86,340,85,358,60,359,58,337,51,328,41,328,31,313,32,308,30,309,27,312,27,315,32,324,32,326,15,314,21,294" href="re_amt">
<area alt="Sønderjyllands Amt" shape="poly" coords="58,406,59,395,55,388,55,381,61,371,59,359,85,358,86,339,91,330,110,331,115,336,124,337,138,331,140,331,134,336,136,341,134,343,137,347,137,353,142,358,142,362,140,363,142,367,138,370,132,369,126,373,126,376,125,377,128,382,128,385,118,390,125,393,133,388,154,404,153,400,137,387,142,381,148,382,158,392,168,403,170,410,169,414,161,416,153,410,147,407,143,408,146,414,147,418,141,418,137,414,133,406,137,406,128,412,121,417,116,417,112,421,103,420,102,415,97,411,88,412,77,406,70,407,62,408" href="sj_amt">
<area alt="Fyns Amt" shape="poly" coords="154,317,155,322,157,324,174,314,180,314,184,311,189,310,191,308,204,318,206,324,203,329,214,326,210,322,214,308,225,328,219,332,233,356,228,355,231,368,225,385,220,390,222,391,220,397,225,402,228,397,240,372,242,376,238,394,222,435,218,431,218,424,212,418,217,418,217,414,224,413,220,409,219,406,223,402,220,398,210,403,207,393,201,390,184,383,182,386,184,389,195,394,187,394,185,401,206,412,208,417,199,422,184,407,181,399,184,398,186,393,178,384,172,384,170,381,177,378,173,370,164,371,156,361,155,346,147,344,153,340,144,332,140,325,142,324,146,320" href="fy_amt">
<area alt="Københavns Amt" shape="poly" coords="368,274,370,281,371,295,378,308,377,313,371,316,364,311,368,304,368,303,361,308,335,308,334,303,334,300,342,292,354,279" href="kbh_amt">
<area alt="Frederiksborg Amt" shape="poly" coords="372,249,368,255,364,264,368,273,365,275,355,279,342,292,331,288,327,274,329,272,324,259,317,263,312,263,310,258,313,256,324,252,341,239,350,236,355,240,361,242" href="fb_amt">
<area alt="Roskilde Amt" shape="poly" coords="355,308,347,317,340,325,340,330,344,336,351,338,350,340,348,348,337,348,330,342,319,332,306,302,309,300,311,288,309,289,306,285,309,281,313,284,319,278,315,264,325,268,323,274,326,276,330,292,322,292,320,301,323,296,329,301,331,294,330,287,341,292,334,299,335,306,335,308" href="rs_amt">
<area alt="Vestsjællands Amt" shape="poly" coords="288,367,282,366,267,368,263,356,260,351,252,346,263,341,256,324,251,324,251,322,258,319,256,312,240,303,241,302,252,302,242,294,236,293,239,290,242,290,249,292,258,290,266,292,276,286,272,278,278,278,285,276,286,267,267,258,266,253,272,257,282,261,292,261,296,263,306,258,308,261,304,265,304,269,298,271,302,278,302,281,294,286,296,287,302,284,306,289,304,291,298,294,302,296,308,294,308,298,306,302,318,331,329,341,328,350,321,355,319,356,310,351,313,349,313,343,302,336,290,345,301,355,300,357,296,357,292,355" href="svtj_amt">
<area alt="Storstrøms Amt" shape="poly" coords="352,338,359,342,362,353,360,358,352,362,344,362,333,370,334,376,339,378,340,382,338,385,338,389,346,386,351,389,366,391,372,398,370,403,365,402,354,400,342,412,339,412,337,412,340,418,325,438,326,457,321,456,314,442,311,445,292,444,281,450,264,437,248,430,242,423,246,420,250,424,252,420,246,410,257,402,268,402,273,405,278,412,286,418,291,420,291,416,297,414,296,408,307,415,302,404,308,400,311,400,320,404,323,404,326,400,317,394,296,385,310,388,299,373,287,367,293,355,297,357,299,357,301,355,290,345,302,336,312,343,313,348,310,351,319,356,321,356,328,350,329,341,337,348,347,348" href="storstrøms_amt">
</map>