refresh fckeditor other solutions with key button F5 ?

I have read that for resolve the refresh image when one upload image the fckeditor code
connetion is modified with absolute path;

I have read and tested that if I clik button F5 ùI have the refresh;

so other solution for to have that is posible with a code that simule onkeydown F5;
so one can use path relative for connection;

I have founded this code;
it isn’t the correct code but can to be used by expert programmer for to make the correct code for fckeditor;

On IE:
<script language=JavaScript1.2>

// IF IE:
if (document.all)
{
document.onkeydown = function ()
{
var key_f5 = 116; // 116 = F5
if (key_f5==event.keyCode)
{
event.keyCode=0;
alert ("F5 was press!");
}
return false;
}
}
</script>