Convert js integer string to amount type data (sample code)_jquery

function zhen(str) { 
    var arr_1 = ["", "u62fe", "u4f70", "u4edf", "u4e07", "u4ebf"], arr_2 = ["", "u4e07", "u4ebf"]; 
    var maskstr = arr_1.slice(1).join(""); 
    var arr2 = ["u96f6", "u58f9", "u8d30", "u53c1", "u8086", "u4f0d", "u9646", "u67d2", "u634c", "u7396"]; 
    var arr3 = new Array; 
    var arr = str.split(""); 
    arr.reverse(); 
    var _step_ = 4; 
    var _index_ = 0; 
    var int1 = 0, int2 = 0; 
    // var  
    for (var i = 0; i < arr.length; i ) { 
        _index_ = i; 
        int1 = _index_ % _step_; 
        int2 = parseInt(_index_ / _step_); 
        if (int2 > 0 & int1 == 0) { 
            if (maskstr.indexOf(arr3[arr3.length - 1]) != -1) { 
                arr3.pop(); 
            } 
            arr3.push(arr_2[int2]); 
        } 
        if (arr[i] > 0) { 
            if (int1 > 0) { 
                arr3.push(arr_1[int1]); 
            } 
        } 
        arr3.push(arr2[arr[i]]); 
    } 
    arr3.reverse(); 
    return arr3.join(""); 
}