function checknb(lenbpers)
{
	document.getElementById("tab1").style.display="none";
	document.getElementById("tab2").style.display="none";
	document.getElementById("tab3").style.display="none";
	document.getElementById("tab4").style.display="none";

	if (lenbpers == 1)
	{
		document.getElementById("tab1").style.display="inline";
	}
	
	if (lenbpers == 2)
	{
		document.getElementById("tab1").style.display="inline";
		document.getElementById("tab2").style.display="inline";
	}
	
	if (lenbpers == 3)
	{
		document.getElementById("tab1").style.display="inline";
		document.getElementById("tab2").style.display="inline";
		document.getElementById("tab3").style.display="inline";
	}
	
	if (lenbpers >= 4)
	{
		document.getElementById("tab1").style.display="inline";
		document.getElementById("tab2").style.display="inline";
		document.getElementById("tab3").style.display="inline";
		document.getElementById("tab4").style.display="inline";
	}
	
}

function music() {
	var a = Math.random();
	if(a<=0.5)
		fond_musical.innerHTML='<embed src="/conversation.mp3" hidden="true" autostart="true">';
	if(a>0.5)
		fond_musical.innerHTML='<embed src="/conversation2.mp3" hidden="true" autostart="true">';
}

function popup(href, id, w, h, r, s) {
	window.open(href, id, 'width='+w+',height='+h+',resizable='+r+',scrollbars='+s+',toolbar=0,directories=0,status=0,menubar=0');
}