Required library edition:
Required library file: dhtmlxgrid.js

sets new column header label

• col - header column index
• label - new label for the cpecified header's column. Can contai img:[imageUrl]Text Label
• ind - header row index (default is 1)

   //set new label for the first column
   mygrid.setColumnLabel(0,"New Column Label");
   //set new label for the second line of the first column
   mygrid.setColumnLabel(0,"New Column Label",1);

See also: getColumnLabel, setFooterLabel