function $SL(element)
{
  element = $(element);
  var method, methods = Proto.Silverlight.Methods;

  for(var name in methods){
    method = methods[name];
    if(typeof element[name] != 'function')
       element[name] = method.curry(element);
  }
  return element;
}

Proto.Silverlight.Methods = {
  getContent: function(element)
  {
    console.log(arguments);
    return element.content;
  }
};

//////

$SL('object_id').getContent();