js error

I have a strange problem here: http://jackyon.com.s146246.gridserver.com/thehappymonk/

I'm using the queryloader2 plugin and maximage2 plugin. it is works fine on all the modern browsers, but is showing the javascript error on IE8 or below. Even ie9 shows an error, but it still can normally run.

js error: 'a.Slide[...].content.length' is null or not an object.

when remove either plugin, the page run without errors.

plugin link for queryloader2: https://github.com/Gaya/QueryLoader2 plugin link for maximage2: https://github.com/akv2/MaxImage

this problem already drive me crazy few dayz. plz help me! thx!!