去掉字符串空格

var str = "14, 19, 23, 25, 61, 6, 3, 31, 15, 31, 3, 18, 12, 61, 4, 5, 14, 11, 2, 26, 24, 6, 2, 1, 14, 11, 8, 6, 6, 2, 12, 27, 51, 22, 25, 24, 28, 3, 61, 22, 81, 26, 61, 1, 23, 11, 2, 26, 27, 11, 17, 29, 12, 14, 19, 5, 19, 24, 41, 16, 16, 41, 27, 22, 9, 91, 21, 41, 5, 29, 4, 7, 15, 27, 17, 81, 7, 9, 71, 8, 21, 19, 12, 17, 8, 13, 51, 9, 7";

str = str.split(",")

var result = "";
for(var i = 0; i < str.length; i++){

    var c = str[i].trim();
   
    if(i == 0){
        result += c;
    }else{
        c = "," + c;
        result += c;
    } 
}

console.log(result);