SMART datagrid v.1 > Classes > ColumnHeader
The URL of image being displayed in column header.
If imageList has been set in Grid Header, you can also specify imageIndex to display the image. If set this property value as a non-empty value, imageIndex will be ignored.
Defaults to null.
column.header().setImageUrl("/img/1.png");
column.setHeader({
imageUrl : "/img/1.png"
});