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Microsoft JScript runtime error: 'null' is null or not an object

by filip 28. May 2008 15:44

Programming JavaScript can be fun, but sometimes when I get errors like this it can get a little frustrating...

Microsoft JScript runtime error: 'null' is null or not an object

It happened on the following line, where the variable 'o' was null:

o.onmousedown = Drag.start;

60586421-d596-41a2-b2c3-7a528d2ad577|6|4.2

Tags: javascript, ajax

Web Development

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Comments (2) -

Rawl

1/5/2010 9:54:31 AM #

check this out midnight-coder.blogspot.com/.../...time-error.html or try latest update ajaxcontroltoolkit.codeplex.com/.../changesets

Di Tran Dai

6/1/2010 11:57:33 PM #

if you used:
ModalPopup1.Enabled = False
ModalPopup1.Hide()

Then you change:
ModalPopup1.Enabled = False

or
ModalPopup1.Hide()

don't use both

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