where do I add target=_blank

<script type="text/javascript">
var i;
var gentages = 5; /*det antal gange det skal gentages*/
var link = "test";
var tekst = "bommelom";
for (i=0; i<gentages; i++) {
    document.write("<a href=\""+link+"\">"+tekst+"</a><br>\n");
}
</script>

where do I add target=_blank in this script ?