var SetEventCallback = function (type, callback, params, scope){ 
var types = ['onStart', 'onUpdate', 'onRepeat', 'onLoop', 'onComplete'] ; 
if (types.indexOf(type) !== -1) { 
this.callbacks[type] = { 
callback: callback,
scope: scope,
params: params}
; 
} 
return this; 
} 
; 
module.exports = SetEventCallback;