Damn it I was sure I had tried something like that ! :) And THANKS because it's working now, so for those who are interested and who will find this page, the winner is ...
var pdoptions = { target: '#pdresult', success:function()
{fadeoutdiv('#pdresult1')} };
with
function fadeoutdiv(div) {
setTimeout(function(){ $(div).fadeOut('slow'); }, 1000);
};
Big thanks to Wizzud and Richard for their help !

