.class1 A:link {text-decoration: none; color: #808080;}
.class1 A:visited {text-decoration: none; color: #808080;}
.class1 A:active {text-decoration: none; color: #808080;}
.class1 A:hover {text-decoration: none; color: #005B00;}

.class2 A:link {text-decoration: none; color: #000000;}
.class2 A:visited {text-decoration: none; color: #000000;}
.class2 A:active {text-decoration: none; color: #000000;}
.class2 A:hover {text-decoration: none; color: #005B00;}

.class3 A:link {text-decoration: none; color: #000000;}
.class3 A:visited {text-decoration: none; color: #000000;}
.class3 A:active {text-decoration: none; color: #000000;}
.class3 A:hover {text-decoration: underline; color: #000000;}