Thanx DavidCrow, I thought something like "http://myserver/isapilib.dll?str='fieldvalue'" to get the output string. You say that, without changing anything in the html, I can write my isapi dll that will catch all the strings and convert when the form is submitted. right? It seems good in the way that it doesn't require me to change the htmls. I look more into this and get back to u with the progress. Thank u so much, Mahesh