Another W3C valid snippet to replace target=...

<a id="sage" href="http://www.sagewebsitedesigns.com/"
    title="Site by Sage Website Designs"
    onclick="window.open(this.href);
    return false;">Sage
</a>

Or, how about:

onclick="return !window.navigate(this.href)"

which will open the new page in the same window...