function controlla()
{
	obj = document.getElementsByName('Nome_Societa').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert Company Name!') ;
		obj.focus() ;
		return false ;
	}
	obj = document.getElementsByName('Attivita_Societa').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert Company Activity!') ;
		obj.focus() ;
		return false ;
	}
	obj = document.getElementsByName('Indirizzo').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert Address!') ;
		obj.focus() ;
		return false ;
	}
	obj = document.getElementsByName('Citta').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert city!') ;
		obj.focus() ;
		return false ;
	}
	obj = document.getElementsByName('Telefono').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert phone!') ;
		obj.focus() ;
		return false ;
	}
	
	obj = document.getElementsByName('email').item(0) ;
	if(obj.value == '' || obj.value == null)
	{
		alert('Insert E-mail!') ;
		obj.focus() ;
		return false ;
	}
	if(!obj.value.match(/^.+?@.+?\..+$/))
	{
		alert('E-mail address is invalid!') ;
		obj.value = "";
		obj.focus() ;
		return false ;
	}
  obj = document.getElementsByName('autorizzo').item(0) ;
	if(obj.value == '' || obj.value == false)
	{
		alert('Insert E-mail!') ;
		obj.focus() ;
		return false ;

		}
}