>I was wondering if anybody knows how to create a Percentage TextBox. What I >want to be displayed is '86.53%' but the data is stored as 0.8653. This is >simular to the '%' function used in Excel. Supposing you want this just to show (and not to be really used as a value)

..inputmask='999.99%'

ProgrammaticChange
this.value=this.value*100

If you want the original value to be kept (in case you need to save it), you can make another textbox (visible) which will have inputmask 999.99% and value of the first textbox.value*100 whenever the first textbox's value changes.