#b1 {background: url(../images/btn_over.gif) no-repeat;}
#b1 a {background: url(../images/btn.gif) no-repeat;}
#b1, b1 a {width: 56px;}

#b2 {background: url(../images/btn2_over.gif) no-repeat;}
#b2 a {background: url(../images/btn2.gif) no-repeat;}
#b2, b2 a {width: 125px;}

#b3 {background: url(../images/btn3_over.gif) no-repeat;}
#b3 a {background: url(../images/btn3.gif) no-repeat;}
#b3, b3 a {width: 195px;}

#b4 {background: url(../images/btn4_over.gif) no-repeat;}
#b4 a {background: url(../images/btn4.gif) no-repeat;}
#b4, b4 a {width: 177px;}

#b5 {background: url(../images/btn5_over.gif) no-repeat;}
#b5 a {background: url(../images/btn5.gif) no-repeat;}
#b5, b5 a {width: 128px;}

#b6 {background: url(../images/btn6_over.gif) no-repeat;}
#b6 a {background: url(../images/btn6.gif) no-repeat;}
#b6, b6 a {width: 73px;}