HTML WordPress Location - Stupid Questin : I am **not** a hardcore coding geek, although I wish I was...

But from the little bit I learned in Collage in Electronics Engineering, I am able to handle most of my needs on my own.. and I did something but I forgot how I did it....

if you visit my website http://www.mozys.ca   you will notice an "order online" button on the left bottom side..   I need to change the text to ORDERING IS OFFLINE.. and I forgot where I placed the HTML.. **What is the best way to find where an HTML code is placed?** 

I am able to disable the whole box from the styles.css, but I want to put ordering offline for now.. 

I know its embarrassing that I forgot where I placed my code.. but I currently run two restaurants and already spent two hours trying with no luck, if one of you guys can help me save some time I would really appreciate it



Thank you