function roundBlock(el){
	tl = Builder.node('span', { className: 'corner tl' });
	tr = Builder.node('span', { className: 'corner tr' });
	bl = Builder.node('span', { className: 'corner bl' });
	br = Builder.node('span', { className: 'corner br' });	
	el.appendChild(tl); el.appendChild(tr); 
	el.appendChild(bl); el.appendChild(br); 
}

document.observe("dom:loaded", function() {
	$$(".rounded").each(function(el){
		roundBlock(el);
	});	
	
	if (!window.XMLHttpRequest) { pngfix(document.getElementById('content').getElementsByTagName("*")); }
	
});