$(document).ready(function(){
	$('a.button').each(function(){
		var h = '<button onclick="window.location.href = \'' +
				$(this)[0].href +
				'\'; return false"><span><span style="' +
				$(this).attr('style') + '">' +
				$(this).html() +
				'</span></span></button>';
		$(this).before(h);
		$(this).remove();
	});
});