Example of how to use an associative array to create an array with javascript_Basic knowledge

//Arrays in js can be key-value pairs The way exists
var arr = new Array();
arr["A"] = "boss";
arr["B"] = "Emp";
for (var m in arr ) {
            document.write(arr[m] " ");
                                                                                                                                                                                                                                                                 . ["age"] = "18";
person["salary"] = "1888.9";
for (var p in person) {
document.write(person[p] " }
//Does the test use the age attribute?
                                                                                                                                                                                                                                                                                                   .