How to clear certain fields in Acrobat

I have created a fillable PDF with several input fields. What I want to happen is to create a functional button that will clear a field located on a certain page.

This is the script I used, but I am having a Syntax Error: missing ) after argument list1: at line 2.

var alert = app.alert("("This action will clear selected fields on this page.\nDo you want to continue?"",0,2);
if(alert == 4){
this.resetForm("FIELD1");
}