code: function( force ) {
  		if ( this.elem[this.prop] != null && (!this.elem.style || this.elem.style[this.prop] == null) ) {
  			return this.elem[ this.prop ];
  		}
  
  		var r = parseFloat(jQuery.css(this.elem, this.prop, force));
  		return r && r > -10000 ? r : parseFloat(jQuery.curCSS(this.elem, this.prop)) || 0;
  	}
docs: Get the current size