轉自 http://jaichang2008.pixnet.net/blog/post/25344846

--

function checkID( id ) {
    tab = "ABCDEFGHJKLMNPQRSTUVXYWZIO"
    A1 = new Array (1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3 );
    A2 = new Array (0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5 );
    Mx = new Array (9,8,7,6,5,4,3,2,1,1);

    if ( id.length != 10 ) return false;
    i = tab.indexOf( id.charAt(0) );
    if ( i == -1 ) return false;
    sum = A1[i] + A2[i]*9;

    for ( i=1; i<10; i++ ) {
        v = parseInt( id.charAt(i) );
        if ( isNaN(v) ) return false;
            sum = sum + v * Mx[i];
    }
    if ( sum % 10 != 0 ) return false;
    return true;
}

--

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