AppleScript to consistently log into multiple Google Apps account in Safari

google-multilogin.scpt

on js(jscpt)
	set jscpt to "(function _l () {" & jscpt & "}());"
	tell application "Safari" to do JavaScript jscpt in document 1
end js

on log_into_google(method, username, password)
	tell application "Safari" to set URL of document 1 to "https://accounts.google.com/" & method
	delay 2
	js("var f = document.getElementById('gaia_loginform');
		f.Email.value = '" & username & "';
		f.Passwd.value = '" & password & "';
		f.submit();")
	delay 7
end log_into_google

activate application "Safari"
tell application "Safari"
	make new document at end of documents
	set URL of document 1 to "https://accounts.google.com/logout"
end tell
delay 10

log_into_google("ServiceLogin", "primary_account", "password1")
log_into_google("AddSession", "other_account", "password2")
log_into_google("AddSession", "account@domain1.com", "password3")
log_into_google("AddSession", "account@domain2.com", "password4")

tell application "Safari" to set URL of document 1 to "https://plus.google.com"