hitting server twice

[Vijay]

when i used grid.dataSource.transport.options.read.url, its hitting server and also if i use grid.dataSource.page(1), its hitting server again.
Please give me solution.  i have pasted my code as follow
  function  showJobExecTable(jobId) {

                    var grid=$("#jobexecgrid").data('kendoGrid');
                    if(grid!=undefined) {
                        grid.dataSource.transport.options.read.url =contextPath + "/ajax/jobExecs.htm?jobId="+jobId.trim();
                         grid.dataSource.page(1);
                       grid.dataSource.read();
                        grid.refresh();
                  
                    }
                  
     
                }