.combobox{
  border:1px solid #ccc;
  background-color:#fafafa;
  width:400px;
  height:294px;
  overflow:auto;
  padding:0px;
  font-size:12px;  
  position:absolute;
  z-index:1001;
}

.combobox div.row{
  overflow:hidden;
  padding:1px;
  white-space:nowrap;  
}

.combobox div.selected{
  background-color:#00f !important;
  color:#fff;  
}

.combobox div.selected div.col_2{
  background-color:#00f !important;
  color:#fff;  
}

.combobox div.cell{
  float:left;
  overflow:hidden;
  padding:1px;
  padding-right:3px;
  white-space:nowrap;
}

.combobox div.col_1{
  width:50%;
}

.combobox div.col_2{
  width:47%;
  background-color:#eee;
}