Sailor-Moon

I'm very new to php and am working through the book. On chapter 10, e-mail, there are some "alerts" when either entering e-mail information (or incorrectly) echo '<p><em>Thank you for contacting me. I will reply some day.</em></p>'; and echo '<p style="font-weight: bold; color: #C00">Please fill out the form completely.</p>'; Is there a way to have these displayed in the middle of the page? I have enclosed the forms for inputting the e-mail into a talbe and have alligned this in the center, but the error message / completed message appear on the right of the page. Thank you in advance