function Popup(element)
{
	($(element)).observe('click', function() {
	    window.open(($(element)).readAttribute('href'));		    
	});
	
	($(element)).onclick = function() {return false;};		
}

function SetPopupObservers(watch)
{
	var elems = $$(watch); 
	// Depreciated in prototype 1.6.x --> $($(watch)).getElementsByClassName('popup');
	
	$($(elems)).each(function(item) {	
		Popup(item);
	});
	
}
function SetPopups()
{
    SetPopupObservers('.popup');
}

Event.observe(window, 'load', SetPopups);