function GetXmlHttpObject()
{
    var xmlHttp=null;
    try
    {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      
    }
    catch (e)
    {
      // Internet Explorer
      try
      {
        xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
      catch (e)
      {
        //FireFox
        xmlHttp=new XMLHttpRequest();
      }
    }
    return xmlHttp;
}


function getNodeValue(obj,tag)
{
    var data = obj.getElementsByTagName(tag)[0].firstChild.data;
    return data;
}