function getXMLHttp()
{
  var xmlHttp;
  try
  {
	//Firefox, Opera 8.0+, Safari
	xmlHttp = new XMLHttpRequest();
  }
  catch(e)
  {
	//Internet Explorer
	try
	{
	  xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch(e)
	{
	  try
	  {
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	  }
	  catch(e)
	  {
		alert("Your browser does not support AJAX!")
		return false;
	  }
	}
  }
  return xmlHttp;
} // getXMLHttp

function load_phone_number()
{
  var xmlHttp = getXMLHttp(),
	response = '',
	phone_block = null;
  xmlHttp.onreadystatechange = function()
  {
	if(xmlHttp.readyState == 4)
	{
		if(xmlHttp.status == 200) {
			response = xmlHttp.responseText;
			if (response!='')
			{
				phone_block = document.getElementById('head_phone');
				if (phone_block)
				{
					phone_block.innerHTML = response;
				}
				phone_block = document.getElementById('head_phone_footer');
				if (phone_block)
				{
					phone_block.innerHTML = response;
				}
			}
		}
	}
  }

  xmlHttp.open("POST", "/load_phone_number_ajax.php", true); 
  xmlHttp.send(null);
} // load_phone_number