Jquery breaks out at some characters

i am trying to make a social website for some purpose including some new options but i am stuck at sending some string to my database server using JQUERY ajax post request.
it breaks out at some special characters like < or > or ? and at some time & as well.

I have an alternate way to do this which is to submit form instead of making jquery request but this is not an ideal way for me at the moment.
So please tell me if you have any suggestion.
Waiting for any help