JS Runtime errors in Widgets; can’t move Widget

I get the following errors on the Presentation –> Widgets page in the back end. I also can’t move any of the widgets.
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Error
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A Runtime Error has occurred.
Do you wish to Debug?

Line: 227
Error: Object expected
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Yes No
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Error
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A Runtime Error has occurred.
Do you wish to Debug?

Line: 296
Error: Object expected
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Yes No
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Lines 226-227:
resetDroppableHeights();
}

Lines 296-296:
<script type=”text/javascript”>
// <![CDATA[