#b1 {background: url(../images/btn_en_over.gif) no-repeat;}
#b1 a {background: url(../images/btn_en.gif) no-repeat;}
#b1, #b1 a {width: 61px;}

#b2 {background: url(../images/btn2_en_over.gif) no-repeat;}
#b2 a {background: url(../images/btn2_en.gif) no-repeat;}
#b2, #b2 a {width: 147px;}

#b3 {background: url(../images/btn3_en_over.gif) no-repeat;}
#b3 a {background: url(../images/btn3_en.gif) no-repeat;}
#b3, #b3 a {width: 191px;}

#b4 {background: url(../images/btn4_en_over.gif) no-repeat;}
#b4 a {background: url(../images/btn4_en.gif) no-repeat;}
#b4, #b4 a {width: 191px;}

#b5 {background: url(../images/btn5_en_over.gif) no-repeat;}
#b5 a {background: url(../images/btn5_en.gif) no-repeat;}
#b5, #b5 a {width: 140px;}