NoExec = function(event) { var k = event.which || event.keyCode; if (k == 13 || k == 38 || k == 40) { if ($("#atWinByArea").attr("id")) { if (event.which) {//火狐 event.preventDefault(); } else {//IE、Chrome event.returnValue = false; } } } downAt(event); } var target = document.getElementById("saytext"); //指定的的控件Id if (target.addEventListener) {//绑定监听 target.addEventListener("keydown", NoExec, false); target.addEventListener("keypress", NoExec, false); } else if (target.attachEvent) { target.attachEvent("onkeydown", NoExec); }