Javascript not working in PDF

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Thanks I will. This is my first attempt for help on here. Can I upload the file?

This is under all Javascripts:

/

//-------------------------------------------------------------
//-----------------Do not edit the XML tags--------------------
//-------------------------------------------------------------

//<Document-Level>
//<ACRO_source>dropdown</ACRO_source>
//<ACRO_script>
/*********** belongs to: Document-Level:dropdown ***********/
function UpdateTextField(doc, fieldName, newValue)
{
var ar = [];
// Get the values currently stored in the text field and
// convert them to an array
var v = doc.getField(fieldName).value;
if (v.length > 0) {
var ar = v.split(",");
}
// Do we already have newValue in the array?
var foundIt = -1;
for (var i=0; i<ar.length; i++) {
if (ar[i] == newValue) {
foundIt = i;
break;
}
}
if (foundIt != -1) {
// remove the item
ar.splice(i, 1);
}
else { // add the item at the end
ar.push(newValue);
}
// If we have more than four elements,
// remove the oldest one
while (ar.length > 4) {
ar.shift();
}
// conver the array to a string
this.getField(fieldName).value = ar.join();
}
//</ACRO_script>
//</Document-Level>

//<AcroForm>
//<ACRO_source>ddtype:Validate</ACRO_source>
//<ACRO_script>
/*********** belongs to: AcroForm:ddtype:Validate ***********/
UpdateTextField(this, "Text1", event.value);
//</ACRO_script>
//</AcroForm>

/*********** belongs to: AcroForm:ddtype:Validate ***********/
UpdateTextField(this, "Text1", event.value);
//</ACRO_script>
//</AcroForm>

This is in the Action tab of the DD:

I have selected Mouse Enter as my trigger and run a JavaScript as Action.

this.resetForm(["ddtype"]);

This is in Validate: 

I have also checked Run a custom validation script.

UpdateTextField(this, "Text1", event.value);

Debugger is blank.