function isEmail(strEmail){
  validRegExp = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
  if (strEmail.search(validRegExp) == -1) {
    alert('Inserire un indirizzo e-mail valido');
    return false;
  }
  return true;
}

function changeColor(tablecell)
{
	tablecell.style.backgroundColor="#ffcc00"
}
function restoreColor(tablecell)
{
	tablecell.style.backgroundColor="#ffffff"
}

function openSub(w,h,page) { 
	window.open(page,'subview','width='+w+',height='+h+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
}