Info Message Client Script

I am trying to add a blue bar info message under a field with a client script.  I want the info message to be several lines.  How can I do a line break on the info message to have the message show on multiple lines?  I want it to look like the below but I have tried a few different options and it just puts in on the same line.

5 - Exceeds

4 - Meets

function onLoad() {
    g_form.showFieldMsg("u_review", ("5 - Exceeds" +  + "4 - Meets"));
    callback(saveAndClose);

}