Need help clicking on a button on webpage

Hey All.  Hoping someone with more web experience can help me out.  I have a Go button and it show's up in the outer HTML as the below.  I only see the class.  It's not an input with an ID.  There are also more than one button with the class "x&g" on the site..

Thanks!

<BUTTON style="BACKGROUND-IMAGE: url(/OA_HTML/cabo/images/swan/btn-bg1.gif)" class=x7g onclick="submitForm('DefaultFormName',1,{'_FORM_SUBMIT_BUTTON':'customizeSubmitButtonPG2CCake'});return false" type=submit>Go</BUTTON>