Foren / Cotonti / Support / Div Odd Even

This is what i mean.

normal odd/even:

---

below would be in a .tpl file

div class="{\FORUMS_POSTS_ROW_ODDEVEN\}"

below is in a .css file

.odd {background-color:red;}
.even {background-color:blue;}

custom div1/div2:

---

below would be in a .tpl file

div class="{\FORUMS_POSTS_ROW_ODDEVEN\}"

below is in a .css file

.div1 {background-color:orange;}
.div2 {background-color:yellow;}

basicaly like the odd and even but another lot of my own