function afficher_div(div)
{
	if(typeof div == "string")
		div = document.getElementById(div);
	if(div.style.display == "none")
	{
		div.style.display = "";
	}
	else
	{
		div.style.display = "none";
	}
	return true;
}

function switch_tab(div1, div2)
{
	if(typeof div1 == "string")
		div1 = document.getElementById(div1);
	if(typeof div2 == "string")
		div2 = document.getElementById(div2);
	if(div2.style.display == "none")
	{
		div2.style.display = "";
		div1.style.display = "none";
	}
	else
	{
		div2.style.display = "none";
		div1.style.display = "";
	}
	return true;
}