PHP Link Question

Sorry about such a ridiculous question, I'm struggling with this simple task though.

I cannot get the following to open in a new window, can anyone help please?

Code:

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<? echo ($title!='') ? "onclick=document.location='bs-bookings-edit.php?id=".$goid."'" : '' ?>

---

Thanks

$this->load->helper('url');


echo anchor('http://your.link.com/whatever', 'title="My News"', array('target' => '_blank', 'class' => 'new_window'));