extjs

1、监听回车键1

onKeyUp : function(e, t) {
        var me = this, key = e.getKey();

        if (!me.readOnly && !me.disabled && me.editable) {
            me.lastKey = key;
            me.doQueryTask.cancel();

            // perform query w/ any normal key or backspace or
            // delete
            if (!e.isSpecialKey() || key == e.BACKSPACE || key == e.DELETE) {
                if(me.getRawValue() == ''){
                    me.clearValue();
                    return;
                }
                me.doQueryTask.delay(me.queryDelay);
            }else if(key == e.ENTER) {
                this.doQuery(this.getRawValue(), true);
            }
        }
    },

2、监听回车键2

items: [{  
                    fieldLabel: '用户名',
                    id  : 'loginname',
                    cls : 'user',  
                    name: 'loginname',  
                    labelAlign:'right',  
                    labelWidth:65,  
                    maxLength : 30,  
                    emptyText:'请在这里填写用户名',  
                    maxLengthText : '账号的最大长度为30个字符',  
                    blankText:"用户名不能为空，请填写！",//错误提示信息，默认为This field is required!  
                    allowBlank: false  
                },{  
                    fieldLabel: '密   码',  
                    cls : 'key',  
                    name: 'password',  
                    inputType:"password",  
                    labelWidth:65,  
                    labelAlign:'right',  
                    emptyText:'请在这里填写密码',  
                    maxLengthText :'密码长度不能超过20',
                    maxLength : 20,  
                    blankText:"密码不能为空，请填写！",//错误提示信息，默认为This field is required!  
                    allowBlank: false  ,
                    listeners : {
                        specialkey : function(field, e) {
                            if (e.getKey() == Ext.EventObject.ENTER) {
                                login();
                            }
                        }
                    }
                }, {  
                    id : 'id_reg_panel',  
                    xtype : 'panel',  
                    border : false,  
                    hidden : true,  
                    html : '<br><span id="messageTip" style="color:red"> </span>'  
                }]  
            }, {  
                title : '关于',  
                contentEl : 'aboutDiv',  
                defaults : {  
                    width : 230  
                }  
            }]