/**
 * This function will add a target _blank effect with the onclick attribute
 * on any css selector (i.e a.blank => all the a with the class blank)
 * 
 * @author Francois Lavertu
 */
addTargetBlank = 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);    
        }    
    });
}

Event.observe(window, 'load', function() {
	addTargetBlank('a.blank');	
});