window.addEvent('domready',function(){

	$('increaseBtn').addEvent('click',function(){increaseAll();});
	$('decreaseBtn').addEvent('click',function(){decreaseAll();});
	$('printBtn').addEvent('click',function(){window.print();});

});

function increaseAll(){

	$$('p','h1','h2','a').extend($('contentArea').getElements('li')).each(function(M,N){
	
		M.setStyle('font-size',(M.getStyle('font-size').toInt()+1).toString()+'px');
	
	});

}

function decreaseAll(){

	$$('p','h1','h2','a').extend($('contentArea').getElements('li')).each(function(M,N){
	
		M.setStyle('font-size',(M.getStyle('font-size').toInt()-1).toString()+'px');
	
	});

}