Button onClick w/ Google Analytics

Hi,

I pasted this line into the onClick section of the button shortcode and it doesn’t generate right, yet it works on non-shortcode links.

_gaq.push(['_trackPageview', '/outgoing/example.com']);

Here is my shortcode

[su_button url="https://google.com" target="blank" background="#2D89E7" onclick="_gaq.push(['_trackPageview', '/outgoing/example.com']);"]This is the button[/su_button]

Here is a screen shot of my button:

https://app.box.com/s/9clcixmqs01pouqll49s

https://www.ads-software.com/plugins/shortcodes-ultimate/