IE 11 anomolies

[joedarock]

My app works fine with Chrome and also for the most part with IE. However, I'm having issues in IE (ver 11.18714393.0) related to treeview events, specifically with onMouseMove and onContext events. My app senses these events and launches a popup pane that has a grid with lines of data pertaining to the tree node. In IE, the popup has no data lines and I get the following error(s):

SCRIPT438: Object doesn't support property or method 'trunc'
EventProcessing.js (115,17)
SCRIPT438: Object doesn't support property or method 'trunc'
EventProcessing.js (115,17)
SCRIPT438: Object doesn't support property or method 'trunc'
EventProcessing.js (115,17)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)
SCRIPT5007: Unable to get property 'rendering' of undefined or null reference
adv-all.js (1,249939)

Interestingly, I don't get the error on the toplevel nodes of the tree, but I do get it on sub-nodes. Again, no problem with Chrome (ver 11).

[joedarock]

I'd appreciate the courtesy of a reply from support on this.

[support]

It seems like the FusionCharts problem
I need your code demo, or your app's url to locate this issue.

[joedarock]

My code is proprietary to my company. I'll try to build a simpleme demo.