SMART datagrid v.1 > Classes > GridBase
Return all Column objects which have the same tag as parameter tag as array.
In order to get only the first corresponding column, it will call columnByTag.
var columns = grid.columnsByTag('ludi');
if (columns && columns.length > 0) {
for (var i = 0; i < columns.length; i++) {
column.styles().setBackground('#20ff0000');
}
}