# ExternalInterface = is Undefined in IE

**URL:** <https://forum.kirupa.com/t/externalinterface-is-undefined-in-ie/228323>\
**Category:** flash\
**Created:** [June 6, 2007, 10:26pm UTC](https://forum.kirupa.com/t/externalinterface-is-undefined-in-ie/228323 "2007-06-06T22:26:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jgallen23](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/jgallen23/32/3678_2.png) [@jgallen23](https://forum.kirupa.com/u/jgallen23)\
**Post date:** [June 6, 2007, 10:26pm UTC](https://forum.kirupa.com/t/externalinterface-is-undefined-in-ie/228323/1 "2007-06-06T22:26:31Z")

</div>

I’m getting an error when I try to call javascript using

ExternalInterface.call(“setStart”,\_startTime.text);

it works great in Firefox, but in IE I get a WeatherSlider is undefined. Where WeatherSlider is the id of the object and the name of the embed tag.

Anybody got any ideas why?

JGA