#w1 a { width:87px; background: url(images/index2_18.gif) no-repeat; display:block;}
#w1 img {display:block; width:87px; height:51px; border:0;}
#w1 a:hover img {visibility: hidden;}
#w1 a:hover { border:0;}

#w2 a { width:131px; background: url(images/index2_19.gif) no-repeat; display:block;}
#w2 img {display:block; width:131px; height:51px; border:0;}
#w2 a:hover img {visibility: hidden;}
#w2 a:hover { border:0;}
  
#w3 a { width:122px; background: url(images/index2_20.gif) no-repeat; display:block;}
#w3 img {display:block; width:122px; height:51px; border:0;}
#w3 a:hover img {visibility: hidden;}
#w3 a:hover { border:0;}

#w4 a { width:173px; background: url(images/index2_21.gif) no-repeat; display:block;}
#w4 img {display:block; width:173px; height:51px; border:0;}
#w4 a:hover img {visibility: hidden;}
#w4 a:hover { border:0;}

#w5 a { width:131px; background: url(images/index2_22.gif) no-repeat; display:block;}
#w5 img {display:block; width:131px; height:51px; border:0;}
#w5 a:hover img {visibility: hidden;}
#w5 a:hover { border:0;}

#w6 a { width:73px; background: url(images/index2_23.gif) no-repeat; display:block;}
#w6 img {display:block; width:73px; height:51px; border:0;}
#w6 a:hover img {visibility: hidden;}
#w6 a:hover { border:0;}