function xmlhttpPost(strURL, qstring, resultId)
{
    var xmlHttpReq = false;
    var self = this;

    // Mozilla/Safari
    if (window.XMLHttpRequest) 
    {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if(window.ActiveXObject) 
    {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }

    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

    self.xmlHttpReq.onreadystatechange = function() 
    {
        if (self.xmlHttpReq.readyState == 4) 
     	{
            updatepage(self.xmlHttpReq.responseText, resultId);
        }
    }

    self.xmlHttpReq.send(qstring);
}

function updatepage(str, resultId)
{
    document.getElementById(resultId).innerHTML = str;
}