docs: function() {
  		if ( this.options.step ) {
  			this.options.step.call( this.elem, this.now, this );
  		}
  
  		(jQuery.fx.step[this.prop] || jQuery.fx.step._default)( this );
  
  		// Set display property to block for height/width animations
  		if ( ( this.prop === "height" || this.prop === "width" ) && this.elem.style ) {
  			this.elem.style.display = "block";
  		}
  	}