function changeBackground(node) {
	linkElements = node.getElementsByTagName('a');
	linkElements[0].style.background = "url(../img/leftOuter_SelectedLeft.gif) no-repeat"
	linkElements[1].style.background = "url(../img/leftOuter_SelectedMiddle.gif) repeat-x"
	linkElements[2].style.background = "url(../img/leftOuter_SelectedRight.gif) no-repeat"
}
function resetBackground(node) {
	linkElements = node.getElementsByTagName('a');
	linkElements[0].style.background = "url(../img/leftOuter_left.gif) no-repeat"
	linkElements[1].style.background = "url(../img/leftOuter_Middle.gif) repeat-x"
	linkElements[2].style.background = "url(../img/leftOuter_right.gif) no-repeat"
}

function setCookie(c_name,value,exdays)
{
    var exdate=new Date();
    exdate.setDate(exdate.getDate() + exdays);
    var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
    document.cookie=c_name + "=" + c_value;
}

function getCookie(c_name)
{
    var i,x,y,ARRcookies=document.cookie.split(";");
    for (i=0;i<ARRcookies.length;i++)
    {
        x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
        y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
        x=x.replace(/^\s+|\s+$/g,"");
        if (x==c_name)
        {
            return unescape(y);
        }
    }
    
    return null;
}
	
function checkCookie(c_name, value, exdays)
{
    var variable=getCookie(c_name);
    if (variable!=null && variable!="" && variable == value)
    {
        return;
    }
    else
    {
        setCookie(c_name, value, exdays);
    }
}



/*Login home page*/

function loadScript(url, callback)
{
    // adding the script tag to the head as suggested before
   var head= document.getElementsByTagName('head')[0];
   var script= document.createElement('script');
   script.type= 'text/javascript';
   script.src= url;

   // then bind the event to the callback function 
   // there are several events for cross browser compatibility
   script.onreadystatechange = callback;
   script.onload = callback

   // fire the loading
   head.appendChild(script);
}


if (typeof jQuery == "undefined")
{ 
	/** / //Turn on this line when run under proxy
	loadScript("http://static.myngle.com/js/jquery-1.3.2.min.js", function(){
		init_home_login();
	});
	/**/
}

//init_home_login(); //Turn on this line when run under proxy


function init_home_login()
{
	if (typeof jQuery == "undefined")
	{
		setTimeout('init_home_login()', 500);
		return;
	}
	//jQuery.noConflict();

	jQuery(function() {

		//var param = "username=" + username + ";password=" +  password + ";box_id=" + box_id;
		//param = Base64.encode(param);
		var param = location.href;
		param = param.split("#");
		if (param.length == 2)
		{
			param = param[1];
			param = Base64.decode(param);
			param = param.split(";");
			if (param.length == 3)
			{
				var username = param[0].split("=");
				username = username[1];

				var password = param[1].split("=");
				password = password[1];

				jQuery("#username").val(username);
				jQuery("#password").val(password);
				homepageLoginAction('loginForm');
				//homepageAutoLogin(username, password, remember, jQuery("#loginForm").attr('action'), box_id, false);
			}
		}


		jQuery("#homepageLoginForm").submit(function(){
			homepageLoginAction('homepageLoginForm');
			return false;
		});

		jQuery.ajax({
			type : "GET",            
			url : location.protocol + '//' + location.hostname + "/index/getsessid",
			cache: false,
			success: function(result){
				result = result.split(":");
				checkCookie(result[0], result[1], 1);
			}
		});

	});
}
var isRunningLoginChecking = false;

function homepageLoginAction(formName)
{   
	document.getElementById("formName").submit();//Turn off this line when run under proxy
	return;//Turn off this line when run under proxy

    if (isRunningLoginChecking)
        return;
    isRunningLoginChecking = true;
    var username = jQuery("#username").val();
    var password = jQuery("#password").val();
    var remember = jQuery('#remember').attr('checked');
    var action = jQuery("#" + formName).attr('action');
    
    var html = '<div id="msgbox-login" style="position: absolute; width: 100px; height: 100px; text-align: center; padding: 0pt; background-image: url(/static/img/ajax_loader_big.gif); z-index: 999; background-color: white; border-radius: 10px 10px 10px 10px; border: 2px solid blue; top: 2px; margin-left: 695px;"></div>';
    
    var msgbox = document.getElementById("msgbox-login");	
    if (msgbox == null)
    {
        jQuery(html).appendTo(jQuery("#" + formName));
    }
    else
        msgbox.style.display = "block";
    
    homepageAutoLogin(username, password, remember, action, "msgbox-login", false);
}

function homepageAutoLogin(username, password, remember, action, box_id, call_back)
{
    jQuery.ajax({
        type : "POST",
        url : action,
        cache: false,
        dataType : "json",
        data : {
            username : username,
            password : password,
            remember : remember
        },
        success: function(result){
			if (result.error == 999)
			{
				//homepageAutoLogin(username, password, remember, result.url, box_id, call_back);
				var param = "username=" + username + ";password=" +  password + ";box_id=" + box_id;
				param = Base64.encode(param);
				location.href=result.url + "#" + param;
				return;
			}
            else if (result.error != 0)
            {
                if (box_id != '')
                {
                    var msgbox = document.getElementById("msgbox-login");	
                    msgbox.style.display = "none";
                    alert(result.message);
                }
                if (call_back)
                    callbackFromLogin();
                isRunningLoginChecking = false;
                return;
            }
            checkCookie(result.cookies.session_name, result.cookies.session_id, 1);
            checkCookie('lastLoginBeforeNow', result.cookies.lastLoginBeforeNow, 7);
            checkCookie('ctn', result.cookies.ctn, 1);
            checkCookie('isFrench', result.cookies.isFrench, 1);
            
            if (call_back)
                callbackFromLogin();
            else
                if (box_id != '')
                location = result.url;
        }
    });    
}

/* submit login form when press Enter*/
function homepageSumbitLogin(e, formName)
{   
	if(window.event) {
		// IE
		keynum = e.keyCode;
	}else if(e.which) {
		// Netscape/Firefox/Opera
		keynum = e.which;
	}
	if (keynum == 13) {
		homepageLoginAction(formName);
	}
}

function getSearchParam(){
	var objLangId = document.getElementById("langId");
	var objLevel = document.getElementById("level");
	var objLangSpoke = document.getElementById("langSpoke");
	
	var searchParam = "";
	if(objLangId){
		if(objLangId.value){
			searchParam = "langId=" + objLangId.value;
		}
	}
	
	if(objLevel){
		if(objLevel.value){
			if(searchParam == ""){
				searchParam = "level=" + objLevel.value;
			}else{
				searchParam += "&level=" + objLevel.value;
			}
		}
	}
	
	if(objLangSpoke){
		if(objLangSpoke.value){
			if(searchParam == ""){
				searchParam = "langSpoke=" + objLangSpoke.value;
			}else{
				searchParam += "&langSpoke=" + objLangSpoke.value;
			}
		}
	}
	
	return searchParam;
}

/*Simple search home page*/
function homepageSimpleSearchAction(baseUrl)
{   
	var nextUrl = baseUrl + '/course/search/simplesearch';	
	var searchParam = getSearchParam();
	
	if(searchParam != ""){
		nextUrl += "?" + searchParam + "&fromhp=1";
	} else {
		nextUrl += "?fromhp=1";
	}
	window.location = nextUrl;
}


/*Advanced search home page*/
function homepageAdvancedSearchAction(baseUrl)
{   
	var nextUrl = baseUrl + '/course/search/advancesearch';
	var searchParam = getSearchParam();
	
	if(searchParam != ""){
		nextUrl += "?" + searchParam + "&fromhp=1";
	} else {
		nextUrl += "?fromhp=1";
	}
	window.location = nextUrl;
}


/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/
 
var Base64 = {
 
	// private property
	_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
 
	// public method for encoding
	encode : function (input) {
		var output = "";
		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = Base64._utf8_encode(input);
 
		while (i < input.length) {
 
			chr1 = input.charCodeAt(i++);
			chr2 = input.charCodeAt(i++);
			chr3 = input.charCodeAt(i++);
 
			enc1 = chr1 >> 2;
			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
			enc4 = chr3 & 63;
 
			if (isNaN(chr2)) {
				enc3 = enc4 = 64;
			} else if (isNaN(chr3)) {
				enc4 = 64;
			}
 
			output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
 
		}
 
		return output;
	},
 
	// public method for decoding
	decode : function (input) {
		var output = "";
		var chr1, chr2, chr3;
		var enc1, enc2, enc3, enc4;
		var i = 0;
 
		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
 
		while (i < input.length) {
 
			enc1 = this._keyStr.indexOf(input.charAt(i++));
			enc2 = this._keyStr.indexOf(input.charAt(i++));
			enc3 = this._keyStr.indexOf(input.charAt(i++));
			enc4 = this._keyStr.indexOf(input.charAt(i++));
 
			chr1 = (enc1 << 2) | (enc2 >> 4);
			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
			chr3 = ((enc3 & 3) << 6) | enc4;
 
			output = output + String.fromCharCode(chr1);
 
			if (enc3 != 64) {
				output = output + String.fromCharCode(chr2);
			}
			if (enc4 != 64) {
				output = output + String.fromCharCode(chr3);
			}
 
		}
 
		output = Base64._utf8_decode(output);
 
		return output;
 
	},
 
	// private method for UTF-8 encoding
	_utf8_encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	},
 
	// private method for UTF-8 decoding
	_utf8_decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
 
		while ( i < utftext.length ) {
 
			c = utftext.charCodeAt(i);
 
			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
 
		}
 
		return string;
	}
 
}