.cs2 #maincol .col {
  background: url(../img/o_olive_chinese.jpg)  no-repeat;}
  
.cs3 #maincol .col {
  background: url(../img/o_linna_intro.jpg)  no-repeat;}  
  
.cs4 #maincol .col {
  background: url(../img/energy-work-adjustment-feet.jpg)  no-repeat;}