Hi,
Instead of deleting the 2 firsts rows, i have done this trick wich works too...
I have put a first html item before the prompt wich contain : <span id="Period">
I have put a second html item right after the prompt wich contain : </span><script>
document.getElementById('Period').style.display = 'none'; //hide </script>
After the finish button there is another html item :
<script>
var mySpan = document.getElementById("Period");
var myInput = mySpan.getElementsByTagName("select");
myInput[0].selectedIndex = 2
</script>
In fact, i have a hidden prompt wich have a cascading source. It have always only 1 option in it and this is why i have selected the first item in it (index = 2).
Thank you for your help, i know my solution is not for the same problem, but i tryed with your solution without success.