.js.js

/*** language switch functions ***/
(function(){
var prev= window.load;
window.onload = function(){
    if(prev) prev();
    var t = document.getElementsByTagName("h1")[0];
    var switcher = document.createElement("p");
    switcher.appendChild(document.createTextNode("Lingua / Language"));
    
    switcher.classList.add("noprint");
    switcher.style.textAlign="center";
    switcher.style.backgroundColor="salmon"
    var itBt = document.createElement("button");
    var enBt = document.createElement("button");
    
    itBt.setAttribute("type","button")
    enBt.setAttribute("type","button")
    //itBt.setAttribute("id","Italian")
    //enBt.setAttribute("id","English")
    itBt.appendChild(document.createTextNode("Italiano"));
    enBt.appendChild(document.createTextNode("English"));
    switcher.append(itBt);
    switcher.append(enBt);
    
    t.parentNode.insertBefore(switcher,t.nextSibling);
    
	//var itBt = document.getElementById("Italian");
	//var enBt = document.getElementById("English");
	
	var it = document.getElementsByClassName("it");
	var en = document.getElementsByClassName("en");
	
	var toggle = function(enter,out){
		var i;
		for(i=0; i < enter.length; ++i){
			enter[i].style.display="initial";
		} 
		for(i=0; i < out.length; ++i){
			out[i].style.display="none";
		} 
	}
	
	itBt.onclick = function(){
		document.title = "Requisiti";
		itBt.disabled=true
		enBt.disabled=false
		toggle(it,en);
	}
	enBt.onclick = function(){
		document.title = "Requirements";
		itBt.disabled=false
		enBt.disabled=true
		toggle(en,it);
	}
	
	itBt.onclick();
}
})()