Hovering caption

Can someone please help regarding hovering captions? Currently, this is how Iam entering text into the caption. This is from kirupa tutorial. Looks like with this, I can only one line of text into the caption. How can I enter multiple lines of text in the hovering caption?? Thanks in advance!

on (rollOver) {
x = 1;
caption.words = “hello”;
}
on (rollOut) {
x = 0;
caption.words = " ";
}