var changed=false;

function set_changed() {
	changed=true;
}

function checkchanged() {
	if (changed) {
		if (!confirm('Attenzione\r\nCi sono modifiche non salvate.\r\nSi desidera continuare e perdere tali modifiche?')) {
			return false;
		}
	}
	return true;
}

function in_array(v, a) {
	var found=false;
	var i=0;
	while ((! found) && (i<a.length)) {
		found=(v==a[i]);
		i++;
	}
	return found;
}

function scanfloat (campo,evn) {
	var valori=['-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', ','];
	var brwGecko=true;
	var kcode;

	if (!evn) {
		try {
			var evn=window.event;
			kcode=window.event.keyCode;
		} catch (err) {
			alert ('Evento non trovato (scanfloat).');
			return false;
		}
	}

	if (evn.keyCode) {
		kcode=evn.keyCode;
		brwGecko=false;
	} else {
		kcode=evn.which;
	}
	
	if (kcode==13) {
		return true;
	}

	var ccode=String.fromCharCode(kcode);
	var inarrayResult=in_array(ccode, valori);

	if (!inarrayResult && (kcode!=8)) {
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}
	
	if (ccode=='-') {
		if (campo.value.indexOf('-')<0) {
			campo.value='-'+campo.value;
		} else { // sentire se sta cosa piace
			campo.value=campo.value.substr(1);
		}
		
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}

	if ((ccode=='.') || (ccode==',')) {
		if ((campo.value.indexOf('.')>=0) || (campo.value.indexOf(',')>=0)) {
			if (!brwGecko) {
				window.event.returnValue=0;
			}
			return false;
		} else {
			campo.value=campo.value+',';

			if (campo.value.substr(0, 1)==",") {
				campo.value="0"+campo.value;
			}

			if (campo.value.substr(0, 2)=="-,") {
				campo.value="-0,"+campo.value.substr(2);
			}
			
			if (!brwGecko) {
				window.event.returnValue=0;
			}
			return false;
		}
	}

	return true;
}

function scanint (campo, evn) {
	var valori=['-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
	var brwGecko=true;
	var kcode;

	if (!evn) {
		try {
			var evn=window.event;
			kcode=window.event.keyCode;
		} catch (err) {
			alert ('Evento non trovato (scanint).');
			return false;
		}
	}

	if (evn.keyCode) {
		kcode=evn.keyCode;
		brwGecko=false;
	} else {
		kcode=evn.which;
	}

	if (kcode==13) {
		return true;
	}

	var ccode=String.fromCharCode(kcode);
	var inarrayResult=in_array(ccode, valori);

	if (!inarrayResult && (kcode!=8)) {
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}

	if (ccode=='-') {
		if (campo.value.indexOf('-')<0) {
			campo.value='-'+campo.value;
		} else { // sentire se sta cosa piace
			campo.value=campo.value.substr(1);
		}
		
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}
	
	return true;
}

function scandata (campo,evn) {
	var valori=['0','1','2','3','4','5','6','7','8','9'];
	var brwGecko=true;
	var kcode;

	if (!evn) {
		try {
			var evn=window.event;
			kcode=window.event.keyCode;
		} catch (err) {
			alert ('Evento non trovato (scandata).');
			return false;
		}
	}

	if (evn.keyCode) {
		kcode = evn.keyCode;
		brwGecko=false;
	} else {
		kcode = evn.which;
	}

	var inarrayResult=in_array(String.fromCharCode(kcode), valori);

	if (campo.value.length>=10) {
		if (inarrayResult) {
			campo.value="";
		}
	}
	if (! ((inarrayResult) || (String.fromCharCode(kcode)=="/") || (String.fromCharCode(kcode)==".") || (kcode==13))) {
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}
	if (String.fromCharCode(kcode)==".") {
		if (!brwGecko) {
			window.event.keyCode="/".charCodeAt (0);
		}
	}
	if ((campo.value.length+1==3)) {
		campo.value+="/";
	}
	if ((campo.value.length+1==6)) {
		campo.value+="/";
	}
	if ((String.fromCharCode(kcode)=="/")&&((campo.value.length==3)||(campo.value.length==6)||(campo.value.length<2)||((campo.value.length>3)&&(campo.value.length<5)))) {
		if (!brwGecko) {
			window.event.returnValue=0;
		}
		return false;
	}
	
	return true;
}

function checkfile (campo, tipi_file) {
	var err=0;
	var ext;
	var a=[];
	var b;
	var i;
	
	if (campo.value=='') {
		alert('Inserire il file!');
		err=1;
	} else {
		a=campo.value.split('.');
		ext=a[a.length-1];
		ext=ext.toUpperCase();
		err=1;
		
		if (tipi_file!='*') {
			for (i=0;i<tipi_file.length;i++) {
				if (ext==tipi_file[i].toUpperCase()) {
					err=0;
				}
			}
		} else {
			err=0;
		}

		if (err==1) {
			alert('Il file selezionato non è corretto!');
		}
	}
	return err==0;
}

function checkdate(a, empty) {
	var err=0;
	var dateseparator="/";
	
	if (a.length==10) {
		var day=a.substring(0, 2);// day
		var sep1=a.substring(2, 3);// '/'
		var month=a.substring(3, 5);// month
		var sep2=a.substring(5, 6);// '/'
		var year=a.substring(8, 10);// year
	
		if ((month<1) || (month>12)) {
			err=1;
		}
		
		if ((sep1!=dateseparator) || (sep2!=dateseparator)) {
			err=1;
		}
		
		if ((day<1) || (day>31)) {
			err=1;
		}
		
		if ((year<0) || (year>99)) {
			err=1;
		}
		
		if ((month==4) || (month==6) || (month==9) || (month==11)) {
			if (day==31) {
				err=1;
			}
		}

		if (month==2) {
			if ((day>29) || ((day==29) && ((year%4)!=0))) {
				err=1;
			}
		}
	} else {
		if ((a.length==0) && empty) {
			err=0;
		} else {
			err=1;
		}
	}
	return err==0;
}

function checknumber (a, empty) {
	var err=0;
	var re=new RegExp(",", "gi");
	
	if (isNaN(parseFloat((a.toString()).replace(re, '.')))) {
		err=1;
	}
	if ((a.length==0) && !empty) {
		err=1;
	}
	if ((a.length==0) && empty) {
		err=0;
	}
	return err==0;
}


function resetform(frm, hidden_reset) {
	for (i=0; i<frm.elements.length; i++) {
		switch (frm.elements[i].type) {
			case "hidden"			:	break;
			case "textarea"			:
			case "text"				:	frm.elements[i].value="";
										break;
			case "select-one"		:	frm.elements[i].selectedIndex=0;
										break;
			case "select-multiple"	:	while (frm.elements[i].options.length>0) {
											frm.elements[i].options[frm.elements[i].options.length-1]=null;
										}
										break;
		}
	}
	for (i=0;i<hidden_reset.length;i++) {
		frm.elements[hidden_reset[i]].value='';
	}
	return true;
}

function scanemail(campo) {
	var valori=new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	return valori.test(campo.value);
}

function checkemail(email) {
	var valori=new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	return valori.test(email);
}