// JavaScript Document

/* addEvent handler for IE and other browsers */
function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
if (elm.addEventListener){
elm.addEventListener(evType, fn, useCapture);
return true;
} else if (elm.attachEvent){
var r = elm.attachEvent("on"+evType, fn);
return r;
}
}  
/* pre-fill the inputs and textareas with their title attribute value, and add relevant onfocus/onblur handlers */
function prepopulate() {
/* get all inputs */
elements = document.getElementsByTagName('input');
/* loop through the array of elements */
n_elements = elements.length;
for (i = 0; i < n_elements; i++) {
if (elements[i].type=='text') {
elements[i].setAttribute('value',elements[i].getAttribute('title'));
addEvent(elements[i],'focus',input_focus);
addEvent(elements[i],'blur',input_blur);
}
}
/* get all textareas */
elements = document.getElementsByTagName('textarea');
/* loop through the array of elements */
n_elements = elements.length;
for (i = 0; i < n_elements; i++) {
elements[i].value=elements[i].getAttribute('title');
addEvent(elements[i],'focus',input_focus);
addEvent(elements[i],'blur',input_blur);
}
}
function input_focus(e) {
// This is an event handler; get the clicked on element,
// in a cross-browser fashion
if (window.event) {
target = window.event.srcElement;
} else if (e) {
target = e.target;
} else return;
// Make sure that the target is an element, not a text node
// within an element
if (target.nodeType == 3) {
target = target.parentNode;
}
// Paranoia; check this is an input tag
if ((target.nodeName.toLowerCase() != 'input')&&(target.nodeName.toLowerCase() != 'textarea')) return false; 
if (target.value==target.getAttribute('title')) {
target.value='';
}
return true;
}
function input_blur(e) {
// This is an event handler; get the clicked on element,
// in a cross-browser fashion
if (window.event) {
target = window.event.srcElement;
} else if (e) {
target = e.target;
} else return;
// Make sure that the target is an element, not a text node
// within an element
if (target.nodeType == 3) {
target = target.parentNode;
}
// Paranoia; check this is an input tag
if ((target.nodeName.toLowerCase() != 'input')&&(target.nodeName.toLowerCase() != 'textarea')) return false; 
if (target.value=='') {
target.value=target.getAttribute('title');
}
return true;
}
/* add functions to the page's onload handler */
addEvent (window,'load',prepopulate)
function verifica(form) {   
if (form.nome.value == "") {     
alert("Occorre riempire il campo Nome");     
return false;    
} else if (form.cognome.value == "") {     
alert("Occorre riempire il campo Cognome");     
return false;	
} else if (form.mail.value == "" || form.mail.value.indexOf('@')== -1 || form.mail.value.indexOf('.')== -1)  {     
alert("L'indirizzo di e-mail non e' valido."); 
return false;
} else if (form.indirizzo.value == "") {     
alert("Occorre riempire il campo Indirizzo");     
return false;	
} else if (form.citta.value == "") {     
alert("Occorre riempire il campo Citta';");     
return false;	
} else if (form.provincia.value == "") {     
alert("Occorre riempire il campo Provincia");     
return false;	
} else if (form.messaggio_nota.value == "") {     
alert("Occorre inserire un messaggio");     
return false;
} 
else if (form.email.value.lenght<5) 
alert("Il modulo è valido e' sara' inviato.");   
return true; 
}