Changing Text Field Color when filled in

Put this script in Properties > Validate > Run custom validation script-----------------------------------------------------------------
if (getField(fieldName).value == "")
{
this.getField(fieldName).fillColor = color.transparent;
}
else
{
this.getField(fieldName).fillColor = color.white;
}
-----------------------------------------------------------------

;-)

I tried it (of course changing fieldname to the actual name), but nothing happened. :(

What did I do wrong?

If you are using Acrobat forms you either need to create a string variable with your field name or put the field name in quotes.

var fieldName = "My Field Name"; // establish field name to process
if (getField(fieldName).value == "")
{
this.getField(fieldName).fillColor = color.transparent;
}
else
{
this.getField(fieldName).fillColor = color.white;
}// or

if (getField("fieldName").value == "")
{
this.getField("fieldName").fillColor = color.transparent;
}
else
{
this.getField("fieldName").fillColor = color.white;
}// or

var oField = this.getField("My Field Name"); // get "My Field Name" object

if (oField.value == "") // test field object's value
{
oField.fillColor = color.transparent; // set field object's fill color
}
else
{
oField.fillColor = color.white; // set field object's fill color
}

Oops !

;-))

For some reason my modified script below is working randomly! it's supposed to change color when 3 or 6 is entered into the text field.
Please help!

var oField = this.getField("Text1"); // get "My Field Name" object

if (oField.value == "3") // test field object's value
{
oField.fillColor = color.yellow; // set field object's fill color

}else if (oField.value == "6") // test field object's value
{
oField.fillColor = color.red; // set field object's fill color

}else
{
oField.fillColor = color.white; // set field object's fill color
}

If "Text1" is the field that this script is attached to, try this:

// Validate script for text field
switch (event.value) {
case "3":
event.target.fillColor = color.yellow;
break;
case "6":
event.target.fillColor = color.red;
break;
default:
event.target.fillColor = color.white;
break;
}