jQuery(document).ready(function() {
	jQuery.fn.esquinas = function(bg,params) {
		jQuery(this).each(function() {
			jQuery(this).css('position','relative')
			.append('<div class="topleft"></div><div class="topright"></div><div class="bottomleft"></div><div class="bottomright"></div>');
		});
	}
	
	jQuery('.esquinas').esquinas();
});