Two more useful methods that change the appearance of an element on the page are height() and width().
They are both getters, but will act as a setter if provided with an argument. Passing an integer, like $element.height(50) will set the height to 50 pixels (pixels are the default unit).
It is possible to specify another unit of measurement by passing a string.
function rotate($that) {
//swap the height and width attributes
//of $that using .height and .width;
$that.height($that.weight());
$that.width($that.height());
}