Here is a function called switchMonthDay() which can be used on any value that you pass into WA Data Assist to enable international date formats to be used. Here's the ASP VBScript version of the function:
<%
function switchMonthDay(theDate)
dim theMonth,theDay,theYear
theMonth = Left(theDate,inStr(theDate,"/")-1)
theYear = Right(theDate, Len(theDate) - inStrRev(theDate,"/"))
theDay = Mid(theDate,inStr(theDate,"/")+1, inStrRev(theDate,"/")-inStr(theDate,"/")-1)
switchMonthDay = theDay & " / " & theMonth & " / " & theYear
end Function
%>
Just add this function to the top of your page just after the include lines in the code. Then when you set up your server behaviors just wrap the value you wish to format in the switchMonthDay() function call:
<%=switchMonthDay(request.Form("dateField))%>