Event.observe(window, 'load', function(){
	resolveExternalLink('a.blank');
})
/**
 * This function will simulate target="_blank"
 * on any css selector (i.e a.blank => all the a with the class blank)
 *
 * @author Francois Lavertu
 */
resolveExternalLink = function(sCssSelector){
    $$(sCssSelector).invoke('observe', 'click', function(e){
        // check if the element as the href attribute
        if(this.href){
            window.open(this.href);
            Event.stop(e);
        }
    });
}