Fixed syntax error in tracking

I used GA debug plugin https://chrome.google.com/webstore/detail/google-analytics-debugger/jnkmfdileelhofjcijamephohjechhna/related?hl=en

It complained for the parameters for `_setCustomVar` so I turned first and last to integers.

Also https://productforums.google.com/forum/#!topic/analytics/XJnmfKhRUKw stated that `_trackPageView` should be `_trackPageview`