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Update: I finally figured out that "keypress" has a better compatibility than "keydown" or "keyup" on Linux platform. I just changed "keyup"/"keydown" to "keypress", so all went well. I don't know what the reason is but it is solution for me. Thanks all who had responsed my question. -- I have some codes that needs to detect key press event (I have to know when the user press Enter) with JQuery and here are the codes in Javascript: j.input.bind("keyup", function (l) { if (document.selection) { g._ieCacheSelection = document.selection.createRange() } }).bind("keydown", function(l) { //console.log(l.keyCode); if (l.keyCode == 13) { if(l.ctrlKey) { g.insertCursorPos("\n"); return true; } else { var k = d(this), n = k.val(); if(k.attr('intervalTime')) { //alert('can not send'); k.css('color','red').val('Dont send too many messages').attr('disabled','disabled').css('color','red'); setTimeout(function(){k.css('color','').val(n).attr('disabled','').focus()},1000); return } if(g_debug_num[parseInt(h.buddyInfo.id)]==undefined) { g_debug_num[parseInt(h.buddyInfo.id)]=1; } if (d.trim(n)) { var m = { to: h.buddyInfo.id, from: h.myInfo.id, //stype: "msg", body: (g_debug_num[parseInt(h.buddyInfo.id)]++)+" : "+n, timestamp: (new Date()).getTime() }; //g.addHistory(m); k.val(""); g.trigger("sendMessage", m); l.preventDefault(); g.sendStatuses(""); k.attr('intervalTime',100); setTimeout(function(){k.removeAttr('intervalTime')},1000); return } return } } It works fine

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