var aTags = document.getElementsByTagName('a');

for(var i = 0; i < aTags.length; i++) {
    if(aTags[i].href.match(/map/)) {
        aTags[i].onclick = function() {
            (window.open(this.href, 'map', 'width=638,height=638,scrollbars=no,resizable=yes,toolbar=no,menubar=no,location=no,status=no')).focus();
            return false;
        }
    }
}