var navigateur = navigator.appName;
	var resultat = navigateur.search(/Microsoft.+/);
		
	function afficher() {
		if(resultat != -1) {
			im2.style.top="350pt";
			im2.style.left="150pt";
			im2.style.visibility="visible";
			im2.visibility="visible";
			im3.visibility="visible";
		}
		else {		
			document.im2.style.top="350pt";
			document.im2.style.left="150pt";
			document.im2.style.visibility="visible";
			document.im2.visibility="visible";
			document.im3.visibility="visible";
			}
	}	

	function non_afficher() {
		if(resultat != -1){
			im2.style.visibility="hidden";
			document.im3.visibility="hidden";
		}
			else{
				document.im2.style.visibility="hidden";
				document.im3.visibility="hidden";
			}
	}