Validate a drop down list with Javascript

Question

I have a PDF form with a few drop down lists and I want to be able to validate that the person filling the form is not putting the default item. What is the javascript validation code I should be using ?

For example : One of my drop down list is Location and the user can choose between all of the locations we have. I added an option that is called « Select here » that is the default item in my drop down list. Is there a javascript code that would validate that the user didn't leave the « Select here » item on ?

try67 · Accepted Answer

I did a lookup and I'm not quite sure which one would be the « complete » solution. There are so many answers and reply that I can't seem to find the « final » answer with the right code ?Here you go: function validateRequiredFields(doc) {var emptyFields = [];for (var i=0; i<doc.numFields; i++) { var f = doc.getField(doc.getNthFieldName(i)); if (f!=null && f.type!="button" && f.required && f.valueAsString==f.defaultValue) {emptyFields.push(f.name);}}if (emptyFields.length>0) { app.alert("You must fill in the following fields:
" + emptyFields.join("
")); return false;}return true;} And then you can call it like this: if (validateRequiredFields(this)) this.mailDoc({cTo: "me@server.com"});

try67 · Answer

What should trigger this validation?

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