//initialise global variables 
var part1_array=new Array;
var part2_array=new Array;
var i=0; 
var j=0;
var word;
var footer;
var save;
var learning;

//function to set cookie 
function setCookie(c_name,value,expiredays){
	var exdate=new Date();exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
} 


//function set get the value of a cookie - returns empty string if not present
function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1; 
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    } 
  }
return "";
} 


function ajaxFunction() {
	var xmlHttp;
	try { 
		// Firefox, Opera 8.0+, Safari  
		xmlHttp=new XMLHttpRequest(); 
	}
	catch (e) { 
	// Internet Explorer  
		try { 
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");    
		}
		catch (e) {
			try {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");     
			}
			catch (e) {
				alert("Your browser does not support AJAX!");    
				return false;  
			} 
		}  
	} 
	
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) {
			document.getElementById('element').innerHTML = xmlHttp.responseText;
		}
	}	
	xmlHttp.open("GET","ajax/time.php",true);
	xmlHttp.send(null);  
}




//function to toggle the choice of learning material form
function toggleChoice(){
	
	//initialise text variable.
	var text = "";

		//construct toggle form text
	text = text + "<tr><td><input type = 'radio' value = '1' name = 'helpii_ch'></td><td class = 'standardwhite'>englische Ausdrücke</td></tr>";
		//construct toggle form text
	text = text + "<tr><td><input type = 'radio' value = '2' name = 'helpii_ch'></td><td class = 'standardwhite'>deutsche Ausdrücke</td></tr>";
	
	if(j==0){
		document.getElementById('switch_form').className = "standardgreenbg";
		document.getElementById('switch_form').innerHTML = "<table>" + text + "<tr><td align = 'center' colspan = '2'><input type = 'submit' name = 'submit' value =" + save + "></td></tr></table>";
		j=1;
	}
	else {
		document.getElementById('switch_form').className = "standard";
		document.getElementById('switch_form').innerHTML = ""; //set back to blank
		j=0;
	}
}

//function to set the global language variables
function set_lang_vars (helpii_ln) {
	
		
	//set learning variable
	learning = "englische Ausdrücke";
	
	switch (helpii_ln)
	{
		case "be_en":
			word = "for today - 3 more tomorrow!";
			footer = "Helpii helps you to learn <b>" + learning + "</b>,  <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">and more</a>";
			save = "Save";
			break;
		
		case "be_fr":
			word = "d'aujourd'hui - 3 autres demain!";
			footer = "Helpii vous aide à apprendre des <b>" + learning + "</b>, <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">et encore plus</a>";
			save = "Enregistrer";
			break;
		
		case "be_nl":
			word = "voor vandaag";
			footer = "Helpii helpt u om <b>" + learning + "</b> te leren, <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">en meer</a>";
			save = "Voorkeuren";
			break;
		
		case "nl":
			word = "voor vandaag";
			footer = "Helpii helpt u om <b>" + learning + "</b> te leren, <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">en meer</a>";
			save = "Voorkeuren";
			break;
	
		case "fr":
			word = "d'aujourd'hui - 3 autres demain!";
			footer = "Helpii vous aide à apprendre des <b>" + learning + "</b>, <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">et encore plus</a>";
			save = "Enregistrer";
			break;
			
		case "de":
			word = "für heute - 3 weitere Morgen!";
			footer = "Helpii hilft Ihnen, <b>" + learning + "</b> zu lernen,  <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">und mehr</a>";
			save = "Speichern";
			break;
			
		case "es":
			word = "para hoy - tres otros mañana!";
			footer = "Helpii le ayuda a aprender <b>" + learning + "</b>,  <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">y más</a>";
			save = "Guardar";
			break;
	
		default:
			word = "for today - 3 more tomorrow!";
			footer = "Helpii helps you to learn <b>" + learning + "</b>,  <a class = \"basiclink\" href = \"#\" onclick = \"toggleChoice(); return false;\">and more</a>";
			save = "Save";
	}
}

//brings focus to form
function bring_focus(){document.forms[0].q.focus();}

//toggles the next element in the list
function next_element(){
	
	if (i < 2) { 
		i++;
		document.getElementById('element').innerHTML= part1_array[i] + " - " + part2_array[i];
		document.getElementById('counter').innerHTML= (i+1) + " / 3 " + word;
	
		if (i == 2) { document.getElementById('prev').className= "greenbtn"; document.getElementById('next').className= "greenbtnoff"; }
		else if (i == 0) { document.getElementById('prev').className= "greenbtnoff"; document.getElementById('next').className= "greenbtn"; }
		else { document.getElementById('prev').className= "greenbtn"; document.getElementById('next').className= "greenbtn"; }
	}
}

//toggles the previous element in the list
function prev_element(){

	if (i > 0) { 
		i--;
		document.getElementById('element').innerHTML= part1_array[i] + " - " + part2_array[i];
		document.getElementById('counter').innerHTML= (i+1) + " / 3 " + word;
	
		if (i == 2) { document.getElementById('prev').className= "greenbtn"; document.getElementById('next').className= "greenbtnoff"; }
		else if (i == 0) { document.getElementById('prev').className= "greenbtnoff"; document.getElementById('next').className= "greenbtn"; }
		else { document.getElementById('prev').className= "greenbtn"; document.getElementById('next').className= "greenbtn"; }
	}
}

//display the variable (language elements on the home
function display_element(){

	part1_array[0] = "\"All bets are off\"";
	part2_array[0] = "(USA) If all bets are off, then agreements that have been made no longer apply.";
		part1_array[1] = "\"A chain is no stronger than its weakest link\"";
	part2_array[1] = "This means that processes, organisations, etc, are vulnerable because the weakest person or part can always damage or break them. ";
		part1_array[2] = "\"Alive and kicking\"";
	part2_array[2] = "If someone or something is active and doing well, it is alive and kicking.";
	
document.getElementById('element').innerHTML= part1_array[i] + " - " + part2_array[i];
document.getElementById('counter').innerHTML= (i+1) + " / 3 " + word;
document.getElementById('counter').className = "standard";
}


function display_footer(){
	document.getElementById('footer').innerHTML= footer;
}