Ajax not working

Ajax not working

can someone help me get my ajax to run properly,  i am trying to create and auto completer and the ajax wont run so I ma stuck on this part. http://jsfiddle.net/TMfex/3/ I know my code is not right but where?  how can I fix it.  I want to get it to run so that I can check the length of the ajax response to see If its zero so I can create a "no results" message inside the existing UL in the results DIV.  What am I doing wrong?