// JavaScript Document
function cbXMLHttpRequest(r)
{
    var
	XHR = null,
	browserUtente = navigator.userAgent.toUpperCase();

    if(typeof(XMLHttpRequest) === "function" || typeof(XMLHttpRequest) === "object")
    XHR = new XMLHttpRequest();

    else if(window.ActiveXObject && browserUtente.indexOf("MSIE 4") < 0)
	{
        if(browserUtente.indexOf("MSIE 5") < 0)
            XHR = new ActiveXObject("Msxml2.XMLHTTP");
        else
            XHR = new ActiveXObject("Microsoft.XMLHTTP");
	}
    return XHR;
}

function writeContent(state)
{
	var req = cbXMLHttpRequest(Math.random());
    switch (state)
	{
	    case 'n':
		    req.open("get", "descriptions/norvegia.txt", true);
			req.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
			req.send(null);
			req.onreadystatechange = function() {
                if(req.readyState === 4)
				{
                    if(req.status == 200)
                        document.getElementById("right_col").innerHTML = req.responseText;
					else
					    location.href = "destinazioni-norvegia";
                }
            }
			document.getElementById("header_thin").style.backgroundImage = "url('images/header_n.jpg')";
			break;
		
		case 's':
		    req.open("get", "descriptions/svezia.txt", true);
			req.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
			req.send(null);
			req.onreadystatechange = function() {
                if(req.readyState === 4)
				{
                    if(req.status == 200)
                        document.getElementById("right_col").innerHTML = req.responseText;
					else
					    location.href = "destinazioni-svezia";
                }
            }
			document.getElementById("header_thin").style.backgroundImage = "url('images/header_s.jpg')";
			break;
			
		case 'f':
		    req.open("get", "descriptions/finlandia.txt", true);
			req.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
			req.send(null);
			req.onreadystatechange = function() {
                if(req.readyState === 4)
				{
                    if(req.status == 200)
                        document.getElementById("right_col").innerHTML = req.responseText;
					else
					    location.href = "destinazioni-finlandia";
                }
            }
			document.getElementById("header_thin").style.backgroundImage = "url('images/header_f.jpg')";
			break;
			
		default:
		    req.open("get", "descriptions/danimarca.txt", true);
			req.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );
			req.send(null);
			req.onreadystatechange = function() {
                if(req.readyState === 4)
				{
                    if(req.status == 200)
                        document.getElementById("right_col").innerHTML = req.responseText;
					else
					    location.href = "destinazioni-danimarca";
                }
            }
			document.getElementById("header_thin").style.backgroundImage = "url('images/header_d.jpg')";
	}
}