Debugging

[Vivian]

When using Internet Explorer, a box pops up indicating a
runtime error has occurred - do you wish to debug? Then
says "Line 57 Error: document.images, T1' is null or not
an object.I clicked 'no' debug.
Now on AOL a box keeps poping up titled"Just In Time
Debugger". Then says "Please select a debugger. Possible
debuggers: New Instance of Microsoft Script Editor." At
the bottom of the box it says: Set the currently selected
debugger as the default. Do you want to debug using the
selected debugger?

What is this runtime error, how complicated is it to fix,
and is that what I have to do - debug? If so how?
Thank you for any help.
Vivian

 

[The Unknown P]

Why would anyone want to debug(trouble shoot) the script
on someone elses web page? Turn this feature off. With
your IE browser open click tools\internet options\advanced
tab and scroll down and put a check mark in "disable
script debugging" and then uncheck the box below
it "display a notification about every script error" keep
smiling.