AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <h2>Testing</h2>
  <div ng-controller="MyCtrl">
  From: <input name="Price" type="number" ng-model='object.number["From"]' /> 
      
  To: <input name="Price" type="number" ng-model='object.number["To"]' /> 
                                                          
  </div>
</div>

JavaScript

function MyCtrl($scope) {
    $scope.object = {number : {}};
    $scope.object['number'] = {From: null, To: null}
    console.log($scope.object['number']);
    
    $scope.loadPrice = function(){
        $scope.object['number'].From = "5";   
        $scope.object['number'].To = "5";   
    }

    $scope.loadPrice();
    console.log($scope.object['number'])

}