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    <area shape="rect" coords="170,2,226,37" href="/bbs/board.php?bo_table=iris">

    <area shape="rect" coords="243,1,340,39" href="/bbs/board.php?bo_table=lavender">

    <area shape="rect" coords="355,1,425,39" href="/bbs/board.php?bo_table=peony">

    <area shape="rect" coords="440,1,515,40" href="/bbs/board.php?bo_table=poppy">

    <area shape="rect" coords="530,0,595,38" href="/bbs/board.php?bo_table=rose">

    <area shape="rect" coords="610,0,725,38" href="/bbs/board.php?bo_table=sunflower">

    <area shape="rect" coords="740,0,805,37" href="/bbs/board.php?bo_table=tulip">

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이런식으로 영역설정을 해서 만들었는데  

IRIS LAVENDER ... 등 저 부분을 영역을 잘라서 클릭할수있게 만들었는데 클릭하면 저런식으로 

파란색 박스가 생깁니다. 클릭하고 나면 없어지긴 하는데 클릭할때 생겨요.. 왜그런건가요?