var request = false;
   try {
     request = new XMLHttpRequest();
   } catch (trymicrosoft) {
     try {
       request = new ActiveXObject("Msxml2.XMLHTTP");
     } catch (othermicrosoft) {
       try {
         request = new ActiveXObject("Microsoft.XMLHTTP");
       } catch (failed) {
         request = false;
//alert("no a");
       }  
     }
   }

var redirectURL = '';
var globalRefresh = '';

function loginswitch() {
	document.getElementById('ajres').style.display = 'none';
	document.getElementById('flogin').style.display = 'block';
}

function sub(f) {

	var file = '/membership/ajlogin.htm';
	var str = "";

	for(var i = 0;i < f.elements.length;i++) {
		str += encodeURIComponent(f.elements[i].name) +
		"=" + encodeURIComponent(f.elements[i].value) + "&";

		if(f.elements[i].name == 'ref') {
			redirectURL = escape(f.elements[i].value);
		}

	}

	str +="fh_controller=ajlogin";

	request.open( "POST", file, true );
	request.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
	request.onreadystatechange = updateLogin;
	request.send(str);
    
	document.getElementById('login-button-text').innerHTML = '<img src="/i/aj/indiyell.gif" />';
	//document.getElementById('flogin').style.display = 'none';
	//document.getElementById('ajres').style.display = 'inline';

}

function updateLogin() {

	if (request.readyState == 4) {

		if (request.status == 200) {

			var response = request.responseText.split('<!-- AJLOGIN_SPLIT -->');
			//alert("res is " + response);
			document.getElementById('login-button-text').innerHTML = 'Login';
			document.getElementById('ajres').innerHTML = response[1];
			document.getElementById('flogin').style.display = 'none';
			document.getElementById('ajres').style.display = 'block';

			if(redirectURL != '' && response[0] == 1) {
				window.location = redirectURL;
			}

			if(globalRefresh == 1) {
				window.location.reload(true);
			}    

			if(window.postlogin){postlogin();}

		} else {
			//alert("status is " + request.status);
		}

	}

}

function logout() {

	var file = '/membership/ajlogout.htm';
	request.open( "GET", file, true );
	request.onreadystatechange = updateLogout;
	request.send(null);

	document.getElementById('ajres').innerHTML = '<img src="/i/aj/indiyell.gif" />';
	//document.getElementById('flogin').style.display = 'none';
	//document.getElementById('ajres').style.display = 'block';

}

function updateLogout() {

	if (request.readyState == 4) {

		if (request.status == 200) {
			document.getElementById('ajres').innerHTML = '';
			document.getElementById('ajres').style.display = 'none';
			document.getElementById('flogin').style.display = 'block';

			if(globalRefresh == 1) {
				window.location.reload(true);
			}    

			if(window.postlogout){postlogout();}

		} else {
			//alert("status is " + request.status);
		}

	}

}

function formsub(event) 
{ 

    if (!event.altKey && !event.ctlKey && event.keyCode == 13) 
    { 
        sub(document.getElementById('flogin')); 
    } 

} 

var formOffset = 0;
function mregShow(keyword)
{

    //alert(document.getElementById('minreg').style.display);
    var ucKeyword = keyword.charAt(0).toUpperCase() + keyword.substr(1);
    var mySlider = new Fx.Slide('minreg',{duration:500}).hide();

    document.getElementById("minreg").style.display = '';

    (function(){
        mySlider.toggle();
        document.getElementById('hidalert').value = keyword;
        document.getElementById('visalert').innerHTML = ucKeyword;
        /*
        if (formOffset == 0) {
            mySlider.slideIn().chain(function(){ formOffset = mySlider.wrapper.offsetHeight; alert(formOffset); });
        } else { mySlider.slideOut().chain(function(){ formOffset = mySlider.wrapper.offsetHeight; alert(formOffset); }); }
        */
         }).delay(0);
}

function mformsub(event) 
{ 

    if (!event.altKey && !event.ctlKey && event.keyCode == 13) 
    { 
        createAlert(document.getElementById('hidalert').value); 
    } 

} 
function createAlert(keyword)
{
    var file = '/membership/addalert.htm';
    var f = document.getElementById('minreg');
    var str = "";
    str = "EMAIL="+f.elements['EMAIL'].value+"&FREQ="+getRadioValue(f.elements['FREQ'])+"&KEYWORD="+keyword+"&fh_controller=addalert";
    request.open( "POST", file, true );
    request.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
    request.onreadystatechange= function() { 
        if (request.readyState==4)
            if (request.status==200)
                updateAlert(keyword);
    }
    request.send(str);
}

function updateAlert(keyword) {
    var response = request.responseText;
    //alert("res is " + response);
    if(response.indexOf('Alert Added') != -1) {
        document.getElementById('minreg').style.display = 'none';
        //Need argument here to know which alertkeyword div to update 
        document.getElementById('alert-form').innerHTML = 'Thank you for registering for ZDNet Australia Alerts.';
    }
    else {
        document.getElementById('alerterror').className = 'error';
        document.getElementById('alerterror').innerHTML = response;
        //document.getElementById('flogin').style.display = 'none';
        //document.getElementById('alerterror').style.display = 'inline';
    }
    if(window.postalert){postalert();}
}

// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function getRadioValue(radioObj) {
    if(!radioObj)
        return "";
    var radioLength = radioObj.length;
    if(radioLength == undefined)
        if(radioObj.checked)
            return radioObj.value;
        else
            return "";
    for(var i = 0; i < radioLength; i++) {
        if(radioObj[i].checked) {
            return radioObj[i].value;
        }
    }
    return "";
}