(function(a){a.extend(a.fn,{propertyChange:function(g,h,d){if(!this[0]){return this}var c=this;var f="propertyChange_"+g;c.on(f,h);function b(){var k="__prev_"+g;var i=c.data(k);var j=c[0][g];if(i!=j){c.data(k,j);c.trigger(f)}return arguments.callee}var e="__t_interval_"+g;if(!c.data(e)){c.data(e,setInterval(b(),(d||1)*1000))}return this},})})($);