javascript把汉字转为拼音

Question

下面这个对象，我想用js把它转为拼音：{"110000":"北京市","110101":"东城区","110102":"西城区","110105":"朝阳区","110106":"丰台区","110107":"石景山区","110108":"海淀区","110109":"门头沟区","110111":"房山区","110112":"通州区","110113":"顺义区","110114":"昌平区","110115":"大兴区","110116":"怀柔区","110117":"平谷区","110118":"密云区","110119":"延庆区"}保存为：{"110000":"beijingshi","110101":"dongchengqu","110102":"xichengqu"//...}怎么转呢，没点思路，请各位大佬帮说一下啊