Javascript for warning a number is greater than 73 when filling an Acrobat Form

[Bryan5F8B]

I have a fillable Acrobat form that I would like to have a warning added if the user enters a number greater than 73 a popup would appear with a specific warning that I enter.  I don't know Javascript and I assume I would need to enter this into the Validate field of my form.  Does any have an example script that I could modify?

[Bryan5F8B]

I don't want to use the automatic one that prevents them from putting a number higher than 73 I only want to add a warning about the consequences.

[Nesa Nurani · Accepted solution]

Try this:

if(event.value > 73)
app.alert("Custom message goes here");

[Bryan5F8B]

Thank You! This work perfect.

[Crystal30902972tote]

instead of 73, I want to put a value from another box here. How do I call the value into that spot?