Make a text Field appear/disappear biased on another text fields value

[TahoeKid86]

I am trying to get a text field to disappear if the value in a different text field is equal to or greater than 21.  specifically one text field is titled (”MASTER: age”) another text field is (”under 21 instructions”) the third is (”over 21 instructions”).   (”MASTER: age”)  is automatically calculated based off the date of birth entered in a separate text field.  

If (”MASTER: age”)is 21 or older I want (”under 21 instructions”)to disappear & (”over 21 instructions”) to appear. 

If (”MASTER: age”)is 21 or older I want (”under 21 instructions”)to appear & (”over 21 instructions”) to disappear.  

What text field should I attach the code to, and what code is needed. Everything I've tried so far has not worked.

[ls_rbls · Accepted solution]

Hi,

See here: https://stackoverflow.com/questions/36959629/adobe-pdf-javascript-for-forms-showing-hiding-labels-de... 

You can try something like this (it worked on my end):

//Place this code on the Custom Format Script of the "MASTER: age" field


var master = this.getField("MASTER: age").value;

if (master == "")
{
    getField("under 21 instructions").display=display.hidden;
    getField("over 21 instructions").display=display.hidden;

}
else if (master >= 21)
{

    getField("under 21 instructions").display=display.hidden;
    getField("over 21 instructions").display=display.visible;

}
else if (master <= 20)
{   
    getField("under 21 instructions").display=display.visible;
    getField("over 21 instructions").display=display.hidden;

}

Place the in the "MASTER: age" field custom format script as shown in the slide below:

[TahoeKid86]

Worked like a charm, thank you for the help.

[ls_rbls]

You're welcome.

[Thom Parker]

Here's an article on exactly this topic:

https://acrobatusers.com/tutorials/show_hide_fields/

[avalonpp]

Hi There:

I am trying to do something similar to the above. I set up a javascript based on this thread but I have a sytax error on line 10 and cannot for the life of me figure out what I have done wrong. The file is set up so that when a user types in one of three different dividend rates, the correct Annual Percentage field will appear. It's probably something really stupid since I don't do this very often. I am attaching the plain text file I have made.

[Thom Parker]

Next time please use the code box to post your code.  

One error is that "%" is not a valid character for a number. remove it.

Another error in the code (but isn't something that would be reported) is that the "=" character is for assigning a value. Use "==" for comparisons.  

[avalonpp]

Thanks so much Thom.

I realized I did not have some field names correct, so I did that and this is now my code (the correct name of the field I am trying to add this to is "Dividend Rate"--Problem being that there is a sytanx error in line 3 or 4, but I can't figure it out. Can you please help me out again?

var master = this.getField("Dividend Rate").value;

if (Dividend Rate = "")
{
    getField("APY-TW").display=display.hidden;
    getField("APY-TWP").display=display.hidden;
    getField("APY-TFA").display=display.hidden;

}
else if (Dividend Rate = 3.920)
{

    getField("APY-TW").display=display.visible;
    getField("APY-TWP").display=display.hidden;
    getField("APY-TFA").display=display.hidden;

}
else if (Dividend Rate = 4.400)
{   
    getField("APY-TW").display=display.hidden;
    getField("APY-TWP").display=display.visible;
    getField("APY-TFA").display=display.hidden;

}
else if (Dividend Rate = 4.880)
{   
    getField("APY-TW").display=display.hidden;
    getField("APY-TWP").display=display.hidden;
    getField("APY-TFA").display=display.visible;

}

[Thom Parker]

Again, the "=" character is for assignment, not comparison. 

But the error is on the line

if (Dividend Rate = "")

Dividend Rate is not a legal name for a variable, because it contains a space.  But I think you meant to use the variable you defined in the first line that is assigned the value of the "Dividend Rate" field. 

The line should be this.

if (master == "")

Also, always prefix getField() with the this keyword. 

 this.getField("...")