$.proxy( ctx1.pon_val, ctx1 ) width: 30, height: 30, slide
$.proxy( ctx2.pon_val, ctx2 ) width: 100, height: 100, fade
$.proxy( ctx1.pon_val, ctx2 ) width: 100, height: 100, slide
$.proxy( ctx2.pon_val, ctx1 ) width: 30, height: 30, fade