column.headerCssClass : string Default: undefined
The name(s) of css class(es) that are going to be applied to the header cell of that column.
Examples
  
  <table id="grid"></table>
 <style>
 .italic { font-style: italic }
 </style>
 <script>
     $("#grid").grid({
         dataSource: "../Grid/GetPlayers",
         columns: [
             { field: "ID", width: 20 },
             { field: "Name", width: 100, headerCssClass: "italic" },
             { field: "PlaceOfBirth" }
         ]
     });
 </script>