AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <h2>Todo</h2>
  <div ng-controller="TodoCtrl">
      <button ng-click="callFunction('testClick')">CLICK ME</button>
  </div>
</div>

CSS

.done-true {
  text-decoration: line-through;
  color: grey;
}

JavaScript

function TodoCtrl($scope) {
    
    $scope.callFunction = function (name){
        angular.isFunction($scope[name])
        $scope[name]()
    }
    
    $scope.testClick = function(){
        alert("Called");
    }
}