jQuery Forum

I have a jQuery plugin that returns an instance of a regular javascript class. Inside this class I have a public method setting the style of the selector element with jquery.

Example: http://jsfiddle.net/v4hcC/1/

As you can see jquery doesnt set the css of the element when it receives the undefined argument (value). But if I remove the second argument (value) jquery sets normally the css into the element.

Example: http://jsfiddle.net/mb8Je/3/

Obviously, in the second example it will not set the border at all (no second argument). But the first example now works. Why?

UPDATE: I know that if I do this it will work

1. if($.isPlainObject(style)) {
         options.elemento.css(style);
   } else {
         options.elemento.css(style, value);
   }

But I want this to work as the following:

1. options.elemento.css(style, value);

UPDATE:
This is not a matter of test the value argument inside the method, but make the thing work without any modification in its structure. Since the css() receives 2 arguments and my method passes the identical 2, the method css() should behave equally in both, but thats not what is happening. Why?