function Zuhe() {
    var heads = arguments[0];
    for (var i = 1, len = arguments.length; i < len; i++) {
        if (arguments[i].length) {
            heads = addNewType(heads, arguments[i]);
        }
    }
    return heads;
}
function addNewType(heads, choices) {
    var result = [];
    for (var i = 0, len = heads.length; i < len; i++) {
        for (var j = 0, lenj = choices.length; j < lenj; j++) {
            result.push(heads[i] + '/' + choices[j]);
        }
    }
    return result;
}

调用：

Zuhe(["S1","M2","L3"],["R9","B10"],["a1","b2","c3"]);
Zuhe(["a1","a2","a3"],["b1"],[],[]);