Enter key behave like arrow keys in javaScript

Question

I use jQwidget in my application. When I press Enter I want it to behave like arrow keys (navigate to the left on table's cell. )

($('#documentDetail') as any).jqxGrid({
  handlekeyboardnavigation: function (event, row) {
          var key = event.charCode ? event.charCode : event.keyCode ? event.keyCode : 0;
          if (key == 13) {
             //navigate like arrow keys
          }
}