How to handle if else in case of angular JS

See more:

HTML

AngularJs

I have a url from which I am retrieving state related data but I want to do it for all states. I am passing state as an argument from my html but unable to do so.
Please suggest how to do it. It is working for only one states.

What I have tried:

I have tried following
my.js
-------

var myapp = angular.module('myApp', []);

myapp.controller("HttpPostController", function ($scope, $http) {

    $scope.SendHttpPostData = function () {

        var data = $.param({
            stnm: $scope.stateName,
        });
        var statename = document.getElementById("stnm").value;
        var config = {
            headers : {
                'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8;'
             }
        }
        if(statename==='AP') //here I want to handle for all states using else if condition.
        $http.get('https://myurl', data, config)

        .success(function (data, status, headers, config) {
            $scope.ServerResponse = data.records;
       })

       .error(function (data, status, header, config) {

        });
    };
});

I want to handle based on my input it should handle for all states.