Hi,

Well, I must say... I copied your code but only changed as following
(to save myself writing the conversion functions):

function convertToNumeric(objFld)
{
objFld.value="9700012";
}

function convertToCurrency(objFld)
{
objFld.value="$97,000.12";
}

And it didn't loop endlessly...
2 options:

1) Your conversion function is looping endlessly
2) In any case, you can always write a validation function like
ValidateIsNumeric and add a little IF statement in you
convertToNumeric function to appear like this:

function convertToNumeric(objFld)
{
  if (!ValidateIsNumeric(objFld.value))
  {
      objFld.value=CurrencyToFloat(objFld.value);
  }
}

This might also increase performance on your client browser slightly
if the conversion is a painfull one, just use regular expressions to
make sure there are only digits there...

The loop will still be there I guess but who knows... You can also
send me your actual conversion functions and I'll have a look, we
might also be able to manipulate it with the onkeypress event.

Best of luck!