function apparaitre(num, num2)
{
	a= document.getElementById(num2).offsetLeft;
	b= document.getElementById(num2).offsetWidth;
	c = a+(b /2);
	d= document.getElementById(num).offsetWidth;
	e= c - (d/2);
	
	if (d >30)
		document.getElementById(num).style.left= e+"px";
	
}

function disparaitre(num)
{
	document.getElementById(num).style.left= -999 +'%';
}

function apparaitre2(num, num2)
{
	e= document.getElementById(num2).offsetTop;
	document.getElementById(num).style.top= e+"px";
	
	a= document.getElementById(num2).offsetLeft;
	b= document.getElementById(num2).offsetWidth;
	c = a+b;
	
	d= document.getElementById(num).offsetWidth;
	if (d > 30)
		document.getElementById(num).style.left= c+"px";
}

function disparaitre2(num)
{
	document.getElementById(num).style.left= -999 +'%';
}