add: e.preventDefault(); 
context: function onInputKeyUp (e){        switch (e.keyCode)    {                case 13: /* CR */            e.line = e.target.value;            onInputCompleteLine (e);            break;        case 38: /* up */            if (client.lastHistoryReferenced < client.inputHistory.length - 1)                e.target.value =                    client.inputHistory[++client.lastHistoryReferenced];            break;        case 40: /* down */            if (client.lastHistoryReferenced > 0)                e.target.value =                    client.inputHistory[--client.lastHistoryReferenced];            else            {                client.lastHistoryReferenced = -1;                e.target.value = client.incompleteLine;            }                        break;        case 9: /* tab */            onTabCompleteRequest(e);            break;                           default:            client.incompleteLine = e.target.value;                }}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/64639d5d026457a3e6a63815bd5ce1d2f76f6842/handlers.js/clean/extensions/irc/xul/content/handlers.js