What's wrong with this?

I am trying to make a bookmark script to set a cookie for the current page, to be used by a PHP extension.  But it only partially works.
location.reload() works, but history.go(0); doesn't.  What am I missing here? or is there any alternative to it?


Note, this is written for me so compatibility/user-friendly isn't an issue.
Further more this is the code before I cut out the comments, CRLF, and other extraneous white space.

if(navigator.cookieEnabled)
{
   var myKey = window.prompt("Session Key","Sentix");
   document.cookie = "XDEBUG_SESSION="+myKey; //Sets the XDEBUG cookie
   if(window.confirm("Ok = attempt soft reload/cancel = hard reload"))
   {
        history.go(0); //Try Soft reload
   }
   else
   {
        location.reload();//Hard reload
   }
       
}else {
    alert("!navigator.cookieEnabled");
}