function viewCallHistory(user){
  window.open("viewCallHistory.php?user="+user, 
'view_case', 'width=1000,height=500,resizable=yes,scrollbars=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,copyhistory=no');
}
function deleteCallHistory(){

    var input = confirm('Click OK to delete.');
    if (input){
      return true;
    }else {
      return false;
    }
}