1/**
  2 * @output wp-includes/js/wp-list-revisions.js
  3 */
  4
  5(function(w) {
  6	var init = function() {
  7		var pr = document.getElementById('post-revisions'),
  8		inputs = pr ? pr.getElementsByTagName('input') : [];
  9		pr.onclick = function() {
 10			var i, checkCount = 0, side;
 11			for ( i = 0; i < inputs.length; i++ ) {
 12				checkCount += inputs[i].checked ? 1 : 0;
 13				side = inputs[i].getAttribute('name');
 14				if ( ! inputs[i].checked &&
 15				( 'left' == side && 1 > checkCount || 'right' == side && 1 < checkCount && ( ! inputs[i-1] || ! inputs[i-1].checked ) ) &&
 16				! ( inputs[i+1] && inputs[i+1].checked && 'right' == inputs[i+1].getAttribute('name') ) )
 17					inputs[i].style.visibility = 'hidden';
 18				else if ( 'left' == side || 'right' == side )
 19					inputs[i].style.visibility = 'visible';
 20			}
 21		};
 22		pr.onclick();
 23	};
 24	if ( w && w.addEventListener )
 25		w.addEventListener('load', init, false);
 26	else if ( w && w.attachEvent )
 27		w.attachEvent('onload', init);
 28})(window);
 29