Need to format a form field to add a "%" after the number

Question

I am working on a form that will both print for manual fill-in and also electronic fill-in using reader. My issue  is that I need to
add a "%" symbol after the number input by the user. I can't use the percentage format type because that places a 0.0% in the field
when no data is entered and I can't have that due to the need to be able to print a blank form for manual fill-in. Is there a simpl
e way to append the % character after the user input only if data is in fact input and to leave the field empty otherwise?

Answer 1

I assume you only want the user to input numbers and you've then set the format to number.
In the textfield properties go to the format tab and set it to custom.
Enter a custom keystroke script:
if(!event.willCommit)
var nChars = event.selEnd - event.selStart;
var aFull = event.value.split("");
aFull.splice(event.selStart, nChars, event.change);
var strFull = aFull.join("");
event.rc = !isNaN(strFull);
This will allow user to input numbers only - strings are regarded as user type.
Go to the validation tab and enter a custom validation script:
f = event.value;
if(f) {
    event.value = f + " %";
If I understood your question correctly, that should do the trick.
Torben.