var nn4 = (document.layers) ? true : false;
var ie5 = (document.all) ? true : false;
var dom = (document.getElementById && !document.all) ? true : false;

function GetNavigatorId(id) {
	if (nn4) { idv = document.layers[id];
	} else if (ie5) { idv = document.all[id];
	} else if (dom) { idv = document.getElementById(id);
    } else { idv = false; }
  return idv;
}

function displayID(baliseId) {
  if (document.getElementById && document.getElementById(baliseId) != null) {
    document.getElementById(baliseId).style.visibility='visible';
    document.getElementById(baliseId).style.display='block';
  }
}

function hiddenID(baliseId) {
  if (document.getElementById && document.getElementById(baliseId) != null) {
    document.getElementById(baliseId).style.visibility='hidden';
    document.getElementById(baliseId).style.display='none';
  }
}

function file(fichier) {
	if(window.XMLHttpRequest) // FIREFOX
		xhr_object = new XMLHttpRequest(); 
	else if(window.ActiveXObject) // IE
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); 
	else 
          return(false); 
	xhr_object.open("GET", fichier, false); 
	xhr_object.send(null); 
	if(xhr_object.readyState == 4) return(xhr_object.responseText);
		else return(false);
}

function changeHTML(id,txt) {
	/*
	longueurCible = document.getElementById(id).firstChild.length;
	document.getElementById(id).firstChild.replaceData(0, longueurCible, txt);
	*/
	if (nn4) { idv = document.layers[id];
	} else if (ie5) { idv = document.all[id];
	} else if (dom) { idv = document.getElementById(id);
    } else { idv = false; }
	idv.innerHTML = txt;
}