p.hover a{display:block; width:100px; height:75px;text-align:center;} 

p#p1004_3 a{background:url(upload/ITS1004-0003.jpg) no-repeat center center;} 

p#p1004_3 a:hover{background:url(upload/ITS1004-0003_2.jpg) no-repeat center center;} 

p#p1004_1 a{background:url(upload/ITS1004-0001.jpg) no-repeat center center;} 

p#p1004_1 a:hover{background:url(upload/ITS1004-0001_2.jpg) no-repeat center center;} 

p#p1004_2 a{background:url(upload/ITS1004-0002.jpg) no-repeat center center;} 

p#p1004_2 a:hover{background:url(upload/ITS1004-0002_2.jpg) no-repeat center center;}