身分證字號檢查

identity.js

module.exports = function(id){
		id = id.toUpperCase()
		if (!/^[A-Z][1-2][0-9]{8}$/.test(id))
			return false
		var map = {
			"A":1,
			"B":10,
			"C":19,
			"D":28,
			"E":37,
			"F":46,
			"G":55,
			"H":64,
			"I":39,
			"J":73,
			"K":82,
			"L":2,
			"M":11,
			"N":20,
			"O":48,
			"P":29,
			"Q":38,
			"R":47,
			"S":56,
			"T":65,
			"U":74,
			"V":83,
			"W":3,
			"X":12,
			"Y":21,
			"Z":30
		}
		result = map[id[0]]
		for(var i=1;i<9;i++){
			result+=(id.charCodeAt(i)-48)*(9-i)
		}
		result+=id.charCodeAt(9)-48
		return result%10===0
}