<a href="http://www.abv.bg" id="test">test</a>
<script type="text/javascript">
function openNewWindow( o ) {
o.onclick = function ( e ) {
if( !e )
e = window.event;
window.open( o.getAttribute( 'href' ), '' );
if( e.preventDefault )
e.preventDefault();
e.returnValue = false;
};
};
var test = document.getElementById( 'test' );
openNewWindow( test );
</script>