function getXhr() {
	var xhr = null; 
	
	if(window.XMLHttpRequest) {
		xhr = new XMLHttpRequest(); 
	}
	else if(window.ActiveXObject) {
		try {
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	else {
		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
		xhr = false; 
	} 
	
	return xhr
}

var bolMark = true;

function markall() {
	if (bolMark) {
		for (var i = 0; i < document.messform.length; i++) {
			if (document.messform.elements[i].type == 'checkbox') {
				document.messform.elements[i].checked = true;
			}
		}
	}
	else {
		for (var i = 0; i < document.messform.length; i++) {
			if (document.messform.elements[i].type == 'checkbox') {
				document.messform.elements[i].checked = false;
			}
		}
	}
	bolMark = !bolMark;
}

function MM_jumpMenu(targ,selObj,restore) {
	eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
	if (restore) {
		selObj.selectedIndex=0;
	}
}

function startFade(idDiv) {
	Effect.Fade(idDiv);return true;
}

function stopFade(idDiv) {
	Effect.Appear(idDiv);return true;
}

function infoBulle(action,divID) {
	if(action == 'hide') {
		document.getElementById(divID).style.display = 'none';
	}
	else {
		document.getElementById(divID).style.display = 'block';
	}
}