js 监听回车事件

<script language="javascript" for="document" event="onkeydown">
if (event.keyCode == 13 && event.srcElement.id == "old") {
$("#newP").focus();
}
if (event.keyCode == 13 && event.srcElement.id == "newP") {
$("#two").focus();
}
if (event.keyCode == 13 && event.srcElement.id == "two") {
changePassword()
}
<script>