CHANGING COLOUR OF TEXT BOXES

Are this form text fields?

Hi,

for (var i =0; i < this.numFields; i++){
  var curField = this.getField ( this.getNthFieldName(i));
  if ( curField.type == "text"){
    curField.fillColor = color.red;
  }
}

The code above should do the trick, although I wrote it from the hip so have not been able to test it, if it is a one time thing you can run it from the console.