Ajax call is called twice

[rv20]

I am using a standard ajax script(i think) so i send a query string to a php script and if i add a

 

alert(http_request.responseText);

 

at that section of the ajax js code i get 2 exact same responses.  hence the request to the php is called twice, everything else works apart from this. Any ideas what woud cause this?

 

There is nothing is the code that i have done that makes it call it twice, well nothing obvious.

 

[shlumph]

You're calling the JS function twice. CTRL+F the function name

[brnibrni]

What browser are you using? Because I also got this prob on firefox.