var xmlHttp;

function getXmlHttpObject() 
{ 

    var objXmlHttp;

    try 
    {
        objXmlHttp = new XMLHttpRequest();            
    }
    catch(e)
    {
    
        try
        {
            objXmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch(e)
        {
            objXmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        }    
        
    }
    
    return objXmlHttp;
    
}

function getReturnValue(dataType)
{

    var value = "";

    if (xmlHttp.responseXML.getElementsByTagName(dataType)[0].text == null)
    {
    
        if (xmlHttp.responseXML.childNodes[0].childNodes[0] != null)
        {
            xmlHttp.responseXML.normalize();
            value = xmlHttp.responseXML.childNodes[0].childNodes[0].nodeValue;
        }
        
    }
    else
    {
    
        value  = xmlHttp.responseXML.getElementsByTagName(dataType)[0].text;
    
    }
    
    return value;
  
}