Chrome Extension: Open tab without popup

I've used the following code in my popup.html file:

<script type="text/javascript" charset="utf-8">
    chrome.tabs.create({'url': chrome.extension.getURL('page.html')}, function(tab) {
    });
</script>

When I click the extension icon a new page does open, but so does an empty browser popup near the button. How do I open the tab without the empty popup appearing?

Thanks.