function openPop(popName) {
	switch(popName) {
		case 'upload' :
			var myW = 600;
			var myH = 700;
			var myL = parseInt((parseInt(screen.availWidth))/2)  - (parseInt(myW/2));
			var myT = parseInt((parseInt(screen.availHeight))/2) - (parseInt(myH/2));
			window.open('popUpload.php', popName, 'width='+myW+',height='+myH+',scrollbar=0,toolbar=0,resize=0,left='+myL+',top='+myT);
		break;
	}
}

function viewHelp(_help) {
	var _div = document.getElementById('helpField');
	_div.innerHTML  = "Questo campo...<a href=\"javascript:closeHelp('"+_help+"')\">X</a>";
}

function closeHelp(_help) {
	var _div = document.getElementById('helpField');
	_div.innerHTML  = "";
}
function ckDatiRegistrazione(_form) {

	// controllo i campi
	var _return = true;
	//
	_return     = (ckField_Empty(_form.nome)                 == false ? false : _return);
	_return     = (ckField_Empty(_form.cognome)              == false ? false : _return);
	_return     = (ckField_Email(_form.email)                == false ? false : _return);
	_return     = (ckField_Empty(_form.importo)              == false ? false : _return);
	
	if(_return == false)
		alert("Per procedere è necessario compilare tutti i campi.");
	return _return;
}
// verifica il campo vuoto
function ckField_Empty(_field) {
	if (_field.value == '') {
		return false;
	}
}

// verifica una email
function ckField_Email(_field) {
	var i=new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	if(!i.test(_field.value)) { 
		return false;
	}   
	return true;
}
function cknumber(formname){
		
		var strValue = formname.numero.value;
		var fValue = parseFloat( strValue );
		
		if ( isNaN( fValue ) )
		{
		formname.numero.focus();
		formname.numero.select();
		alert( "Inserire un Numero" );
		return false;
		}
		else
			return true;
}