Hi while using AutoSuggestControls for suggestions onkeydown function only calling one time after that not calling please find the below code.

function onKeyDowntxtBranch() {
  if ((window.event.keyCode != 9 || event.keyCode != 13)) {
    var oTextbox = new AutoSuggestControl(document.getElementById("txtBranchList"), new StateSuggestions());
  }

  if ((window.event.keyCode == 9 || window.event.keyCode == 13)) {

    document.getElementById("btnViewBranches").focus();
    window.event.returnValue = false;
  }
}

Once auto suggestion called after that onkeydown not working please help me to resolve the issue.