// JavaScript Document

function changeInfo(tabNumber) {
  var tabNames = ['Options','Product Information','Related Items','Delivery','Ring Sizes'];
  
  for (i = 1; i <= tabNames.length; i++) {
	document.getElementById('details' + i).style.display = 'none';
  }
  document.getElementById('details' + tabNumber).style.display = '';

  tds = document.getElementById('menu').getElementsByTagName('li');
  for(i = 0; i < tds.length; i++) {
	if (tds[i].className == 'selected')
	  tds[i].className = '';
  }
  document.getElementById('tab' + tabNumber).className = 'selected';
}