window.onload=demarre;


function demarre() {
	
	apparent();
	cyclePhoto();
	
	}


function apparent(id) {
	var d = document.getElementById(id);
		for (var i=1; i<=10; i++) {
			if (document.getElementById('smenu'+i)) {document.getElementById('smenu'+i).style.display='none';}
		}
	if (d) {d.style.display='block';
		}
}

var adImages=new Array("EPG/Images/larveTrichoptere.png","EPG/Images/sautTruite.png","EPG/Images/Gobage1.png","EPG/Images/Gobage.png","EPG/Images/Bataillard.png","EPG/Images/Alevin_1.png","EPG/Images/Alevin_2.png","EPG/Images/Ephemere.png");

function rotation() {
	thisAd++;
	if(thisAd==adImages.length) {
		thisAd=0;
	}
	document.getElementById("adRiviere").src=adImages[thisAd];
	
	setTimeout("rotation()",3*1000);
}

function cyclePhoto() {
	thisAd=Math.floor((Math.random()*adImages.length));
	document.getElementById("adRiviere").src=adImages[thisAd];
	
	rotation();
}