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- var wheelDistance = function(evt){
- if (!evt) evt = event;
- var w=evt.wheelDelta, d=evt.detail;
- if (d){
- if (w) return w/d/40*d>0?1:-1; // Opera
- else return -d/3; // Firefox; TODO: do not /3 for OS X
- } else return w/120; // IE/Safari/Chrome TODO: /3 for Chrome OS X
- };
- var wheelDirection = function(evt){
- if (!evt) evt = event;
- return (evt.detail<0) ? 1 : (evt.wheelDelta>0) ? 1 : -1;
- };
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