jquery 1.2.3 not working in my application

jquery 1.2.3 not working in my application


I have just started learning jquery on the job. I am working on
existing application which uses jquery 1.2.1. I wanted to use 1.2.3
for getting better performance. When I do the substitution and load my
page, I get the following errors
jQuery(document).ready is not a function
jQuery(document).triggerHandler is not a function
I am not sure why these are caused. And both these are very
fundamental stuff. When I compared 1.2.1 and 1.2.3 versions, the
1.2.1's ready function does not have a call to triggerHandler where as
1.2.3's has. Again I am not sure exactly why the addition and why that
should cause a problem.
I commented out the triggerHandler call in ready function of 1.2.3 and
tried out to see if that works. Nope it does not.
Please help me out regarding the same. I am sure I am making some
silly mistake.
Thanks,
nacnez