rem: var _307=elem.offsetWidth; var _308=elem.offsetHeight; 
add: var _324=elem.offsetWidth; var _325=elem.offsetHeight; 
context: },elementDimensions:function(elem){var self=MochiKit.DOM;if(typeof (elem.w)=="number"||typeof (elem.h)=="number"){return new self.Dimensions(elem.w||0,elem.h||0);}elem=self.getElement(elem);if(!elem){return undefined;}if(self.computedStyle(elem,"display")!="none"){return new self.Dimensions(elem.offsetWidth||0,elem.offsetHeight||0);}var s=elem.style;var _305=s.visibility;var _306=s.position;s.visibility="hidden";s.position="absolute";s.display="";var _307=elem.offsetWidth;var _308=elem.offsetHeight;s.display="none";s.position=_306;s.visibility=_305;return new self.Dimensions(_307,_308);},elementPosition:function(elem,_309){
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