bootstrap-datetimepicker选择年和月

$("#year").datetimepicker({    format: 'yyyy',    autoclose:true,    startView:4,    minView:4,    maxView:4,    initialDate:new Date(),    language:'zh-CN'}).on('changeDate', function(){    var date = $("#year").val();    getSaleCount(date);}); $("#month").datetimepicker({    format: 'mm',    autoclose:true,    startView:3,    minView:3,    maxView:3,    initialDate:new Date(),    language:'zh-CN'}).on('changeDate', function(){    var year = $("#year").val();    var month = $("#month").val();    var date = year + month;    getSaleCount(date);});