var ongletOn = 1;
var liens = new Array;
var channel1 = "";

function next(){
	if(ongletOn < 4) {
		onglet(ongletOn+1);
	}
}

function back(){
	if(ongletOn > 1) {
		onglet(ongletOn-1);
	} 
}

function onglet(numOnglet) {
	for(i=1;i<5;i++){
		if(i == numOnglet) {
			ongletOn = numOnglet;
			document.getElementById("onglet"+i+"Bg1").className = "bgWhite";
			document.getElementById("onglet"+i+"Bg2").className = "bgWhite";
			document.getElementById("onglet"+i).className = "navleft";
			if(i != 4) document.getElementById("onglet"+i+"End").src = "content/tab_whiteblue.gif";
		}else {
			document.getElementById("onglet"+i+"Bg1").className = "bgBlue";
			document.getElementById("onglet"+i+"Bg2").className = "bgBlue";
			document.getElementById("onglet"+i).className = "link03";
			if(numOnglet == i+1) {
				if(i != 4) document.getElementById("onglet"+i+"End").src = "content/tab_withe_inner.gif";
			}
			else {
				if(i != 4) document.getElementById("onglet"+i+"End").src = "content/tab_blue_inner.gif";
			}
		}
	}	

	
	if(numOnglet == 1 ) {
		document.getElementById('onglet1Begin').src = "content/tab_white_begin.gif";
	}
	else  {
		document.getElementById('onglet1Begin').src = "content/tab_blue_begin.gif";
	}
	
	
	if(numOnglet == 4 ) {
		document.getElementById('onglet4End').src = "content/tab_white_end.gif";
	}
	else  {
		document.getElementById('onglet4End').src = "content/tab_blue_end.gif";
	}
	
	if(numOnglet < 4) {
		document.getElementById('btNext').style.visibility = "visible";  
	} else {
		document.getElementById('btNext').style.visibility = "hidden";  
	}

	if(numOnglet > 1) {
		document.getElementById('btBack').style.visibility = "visible";  
	} else {
		document.getElementById('btBack').style.visibility = "hidden";  
	}

	/*
	if(numOnglet == 1) {
		frameOnglets.location.href = "a.htm";
	}
	if(numOnglet == 2) {
		frameOnglets.location.href = "b.htm";
	}
	if(numOnglet == 3) {
		frameOnglets.location.href = "b.htm";
	}
	if(numOnglet == 4) {
		frameOnglets.location.href = "b.htm";
	}*/
	
	frameOnglets.location.href = liens[numOnglet];
}