Applescript check if clicking on a button form a different page is loaded

I have a script to repeat 10 times clicking on a form button.

set url1 to "https://site.tdl/page1.html" 
set url2 to "https://site.tdl/page2.html"
tell application "Safari"
	tell window 1
		set current tab to (make new tab with properties {URL:url1})
		repeat 10 times
			delay 5
			tell application "Safari" to do JavaScript "document.getElementById('SelectedButton').click();" in document 1
		end repeat
	end tell
end tell

Regularly the form action loads the same page.

In repeat section I want to check if the url has changed.

Something like

if URL has change (or current URL=url2)
		my sendMail()
		exit repeat
end if

Thanks for any help. I was looking for similar question but couldn't adapt answers to my needs.