如何用js设置select为当前年月

var date = new Date()// new 一个Date对象

var year = date.getFullYear()// 年份

var month = date.getMonth() + 1// 月份（<a href="https://www.baidu.com/s?wd=%E4%BB%8E0%E5%BC%80%E5%A7%8B&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Ykuj0vnWR3nHnvujF-nvD40ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHbdrH0LPHc4P1RYnWTsP1Rsn0" target="_blank" class="baidu-highlight">从0开始</a>，所以应+1）

for(var i = monthi >month - 6i--) {

$("<option value=''>" + year + "年" + i + "月" + "</option>").appendTo($("select"))// 依次添加下拉框选项，value自定义，右边的appendTo参数为目标选择框

}

select sysdate+日 from dual

select add_months(sysdate,月) from dual

select add_months(sysdate,12*年) from dual

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