$(document).ready(function () {
    $("#txt_JumpPager").keydown(function (e) {
      var curKey = e.which;
      if (curKey == 13) {
        $("#lbtn_JumpPager").click();
        return false;
      }
    });
});





//回车事件
$(document).keyup(function (event) {
    if (event.keyCode == 13) {
        $(".log-but").triggerHandler("click");
    }
});


以上两种方法都ok