function checkCommentForm()
{
	if(document.getElementById('title').value == "")
	{
		document.getElementById("title").style.background = "rgb(255,204,204)";
		document.getElementById("title").focus();
		alert('Inserisci il titolo');
		return false;
	} else if(document.getElementById('comment').value == "") {
		document.getElementById("comment").style.background = "rgb(255,204,204)";
		document.getElementById("comment").focus();
		alert('Inserisci Commento');
		return false;
	}
	
	document.getElementById('submit_but').disabled = true;
}