var http_request = false;

function InitAJAXRequest() {

    http_request = false;
    if (window.XMLHttpRequest)
    {
        // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType)
        {
            http_request.overrideMimeType('text/xml');
        }
    }
    else if (window.ActiveXObject)
    {
        // IE
        try
        {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try
            {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch (e) {}
        }
    }

    if (!http_request)
    {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }
}

function PartialUpdateForLocation(url, DropDown, TableToUpdateID)
{
    InitAJAXRequest();
    TableToUpdate = document.getElementById(TableToUpdateID);
    http_request.onreadystatechange = 
    function DoAutoSuggest()
    {
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
                var xmldoc = http_request.responseXML;
                var root = xmldoc.getElementsByTagName('root')[0];
                var data = root.getElementsByTagName('data');
                TableToUpdate.deleteRow(1);
                var newRow = TableToUpdate.insertRow(1);
                for (var i = 0 ; i < data.length ; i++) 
                {
                    var item = data[i];
                    var Address1 = item.getElementsByTagName('Address1')[0].firstChild.nodeValue;
                    var Address2 = item.getElementsByTagName('Address2')[0].firstChild.nodeValue;
                    var Town = item.getElementsByTagName('Town')[0].firstChild.nodeValue;
                    var Postcode = item.getElementsByTagName('Postcode')[0].firstChild.nodeValue;
                    var ContactTel = item.getElementsByTagName('ContactTel')[0].firstChild.nodeValue;
                    var ContactName = item.getElementsByTagName('ContactName')[0].firstChild.nodeValue;
                    var ContactEmail = item.getElementsByTagName('ContactEmail')[0].firstChild.nodeValue;
                    
                    var CellAddress1 = newRow.insertCell(0);
                    CellAddress1.innerHTML = Address1;
                    var CellAddress2 = newRow.insertCell(1);
                    CellAddress2.innerHTML = Address2;
                    var CellTown = newRow.insertCell(2);
                    CellTown.innerHTML = Town;
                    var CellPostcode = newRow.insertCell(3);
                    CellPostcode.innerHTML = Postcode;
                    var CellContactTel = newRow.insertCell(4);
                    CellContactTel.innerHTML = ContactTel;
                    var CellContactName = newRow.insertCell(5);
                    CellContactName.innerHTML = ContactName;
                    var CellContactEmail = newRow.insertCell(6);
                    var anchorTag = document.createElement('a');
                    
                    anchorTag.href = 'mailto:' + ContactEmail + '?subject=ICAT%20audit&body=Dear%20' + ContactName + ',%0AENTER%20YOUR%20MESSAGE%20HERE.';
                    anchorTag.innerHTML = ContactEmail;
                                        
                    CellContactEmail.appendChild(anchorTag);
                    
                }
            }
            else {
                    alert('There was a problem with the request.' + http_request.status);
            }
        }
        
        
    }
    ;
    http_request.open('GET', url + '?r=1&LocationId=' + DropDown.value, true);
    http_request.send(null);
}