How do I make the text in my text area go to the next line instead of continuously running?

Here is a link to my website the jotform is on: www.nmrgraphics.com/Contact.html

I am using google chrome and when I type in the text area it just keeps going and doesn't go to the next line when it reaches the end of the textbox. I only really want it to work that way for the message box.

If you need more information please ask!

Thanks!