function auto_grow(t) {
	while (t.rows > 2 &&	t.scrollHeight < t.offsetHeight) {
		t.rows--;
	}
	while (t.scrollHeight > t.offsetHeight)	{
		t.rows++;
	}
}

function bg_dark(Opacity) {
	if (document.getElementById('bg_dark').style.display=='none') {
		document.getElementById('bg_dark').style.display='';
		document.getElementById('bg_dark').style.filter='alpha(opacity='+(Opacity*100)+')';
		document.getElementById('bg_dark').style.opacity=Opacity
	} else {
		document.getElementById('bg_dark').style.display='none';
	}
}

function setClass(objet,dmcNom) {
	objet.className=dmcNom;
}