input设默认值 回车执行查询

// 绑定事件$("#query-vaule").on({focus:keywordsDefualt,blur:setDefualt,keydown:keywordsInput});

        // 获得焦点后，去默认值        var keywordsDefualt = function(e){if(e.value == e.defualtValue)e.value =="";}// 失去焦点后设默认值  var setDefualt = function(e){if(e.value == "")e.value = e.defualtValue;}

            // 检测回车事件  var keywordsInput = function(){var event = event || window.event;if(event.keyCode == 13)query();//查询函数}