Element.prototype.wh

@Description: Sets the width and height of the element
@File: Element/prototype/wh.js
@Param: String/Number w The element width desired, can be specified as a number e.g. 100 or as a percent '100%'
@Param: String/Number h The element height desired, can be specified as a number e.g. 100 or as a percent '20%'
@Example:

myElement.wh(100, 200);