js事件--enter触发

<script>
function EnterPress(e){ //传入 event
var e = e || window.event;
if(e.keyCode == 13){
document.getElementByIdx_x_x("txtAdd").focus();
}
}
</script>

<input type="text" id="txtName" onkeypress="EnterPress(event)" onkeydown="EnterPress()" />
<input type="text" id="txtAdd" />

     $(function () {
           document.onkeydown = function (event) {
               var e = event || window.event || arguments.callee.caller.arguments[0];
               if (e && e.keyCode == 13) {
                   //to do something;
               }
           };
       });