function ajuster() {
	var Hg=document.getElementById('txt').scrollHeight+40;
	//if(Hg > 700){//peut etre affiner ce seuil
	//document.getElementById('corps').style.height = Hg+'px';
	document.getElementById('conteneur').style.height = (Hg+180)+'px';
	//}
}
$(document).ready(function(){
	ajuster();
});