function cambiaImmagine(){
img= new Array();
img[0]="foto/Image1.jpg";
img[1]="foto/Image2.jpg";
img[2]="foto/Image3.jpg";
img[3]="foto/Image4.jpg";
img[4]="foto/Image5.jpg";
img[5]="foto/Image6.jpg";
img[6]="foto/Image7.jpg";
img[7]="foto/Image8.jpg";
img[8]="foto/Image9.jpg";
img[9]="foto/Image10.jpg";
img[10]="foto/Image11.jpg";
img[11]="foto/Image12.jpg";
img[12]="foto/Image13.jpg";
img[13]="foto/Image14.jpg";
img[14]="foto/Image15.jpg";
img[15]="foto/Image16.jpg";
img[16]="foto/Image17.jpg";
img[17]="foto/Image18.jpg";
img[18]="foto/Image19.jpg";
img[19]="foto/Image20.jpg";
img[20]="foto/Image21.jpg";
img[21]="foto/Image22.jpg";
img[22]="foto/Image23.jpg";
img[23]="foto/Image24.jpg";
img[24]="foto/Image25.jpg";
img[25]="foto/Image26.jpg";
img[26]="foto/Image27.jpg";
img[27]="foto/Image28.jpg";
img[28]="foto/Image29.jpg";
img[29]="foto/Image30.jpg";
img[30]="foto/Image31.jpg";

i=Math.round(Math.random()*6);
j=8+Math.round(Math.random()*6);
k=16+Math.round(Math.random()*6);
z=24+Math.round(Math.random()*6);
document.getElementById("immagine1").src=img[i];
document.getElementById("immagine2").src=img[j];
document.getElementById("immagine3").src=img[k];
document.getElementById("immagine4").src=img[z];
}

function verifica(){
	controllo=0;
	if(document.getElementById("nm").value==""){
		
		document.getElementById("nm").style.background="blue";
	
	}else controllo++;
	if(document.getElementById("cnm").value==""){
		
		document.getElementById("cnm").style.background="blue";
	
	}else controllo++;
	if(document.getElementById("em").value==""){
		
		document.getElementById("em").style.background="blue";
	
	}else controllo++;
	if(document.getElementById("ogg").value==""){
		
		document.getElementById("ogg").style.background="blue";
	
	}else controllo++;
	if(document.getElementById("msg").value==""){
		
		document.getElementById("msg").style.background="blue";
	
	}else controllo++;
	
	
		
	if(controllo<5){
		alert("Completare i campi evidenziati");}
	if(controllo==5)
		ControllaMail();

}

function cambia(identificatore){
	document.getElementById(identificatore).style.background="yellow";
}

function normale(identificatore){
	document.getElementById(identificatore).style.background="white";
}

function ControllaMail()
   {
   EmailAddr = document.getElementById("em").value;
   Filtro = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-]{2,})+\.)+([a-zA-Z0-9]{2,})+$/;
   if (Filtro.test(EmailAddr))
      document.form_contatti.submit();
   else
      {
      alert("Controlla l'indirizzo di e-mail inserito");
      document.getElementById("em").style.background="blue";
	 // document.getElementById("em").focus();
      return false;
      }
   }