function stop()
{
	window.clearTimeout(b);
	c = 1;
}
function animdiv()
{
		if (c == 1)
		{
			c = 0;
			b = setTimeout("animdiv()",1000);
		}
		else
		{
			if (a == 0)
			{
				document.getElementById("assistance").style.display="block";
				document.getElementById("expertbdd").style.display="none";
				a++;
			}
			else if (a == 1)
			{
				document.getElementById("assistance").style.display="block";
				document.getElementById("expertbdd").style.display="none";
				a=0;
			}		
			b = setTimeout("animdiv()",6000);
		}
}