IsValidIDorRCNumber.java

public static boolean isValidIDorRCNumber(String ID) {
    if (ID == null || ID.trim().isEmpty() || !ID.matches("[A-Za-z][A-Da-d1289]\\d{8}")) {
        return false;
    }
    String head = "ABCDEFGHJKLMNPQRSTUVXYWZIO";
    char[] id = ID.toUpperCase().toCharArray();
    int chksum = (head.indexOf(id[0]) + 10) / 10
            + (head.indexOf(id[0]) + 10) % 10 * 9 % 10;
    chksum += (id[1] > '@' && id[1] < 'E') ? ((head.indexOf(id[1]) + 10) % 10) * 8 % 10
            : (id[1] - 48) * 8 % 10;
    for (int i = 2, j = 7; i < 9; i++, j--) {
        chksum += ((id[i] - 48) * j % 10);
    }
    return (10 - (chksum % 10)) % 10 == (id[9] - 48);
}

isValidIDorRCNumber.js

function isValidIDorRCNumber(str){
  if(!str || !/[A-Za-z][A-Da-d1289]\d{8}/.test(str))
    return false;
    /*第1碼照位置展開成2碼數字,第2碼若不是數字，則照位置展開取個位，其餘與一般身份證驗證規則同*/
    var head="ABCDEFGHJKLMNPQRSTUVXYWZIO";
    var id = str.toUpperCase().split("");
    var chksum = Math.floor((head.indexOf(id[0])+10)/10)+
		  (head.indexOf(id[0])+10)%10*9%10;
    chksum += isNaN(Number(id[1]))?((head.indexOf(id[1])+10)%10)*8%10:Number(id[1])*8%10;
    for(var i=2,j=7;i<9;i++,j--)
	chksum+=Number(id[i])*j%10;
    return  (10 - (chksum % 10)) % 10 == Number(id[9]);
}