function swap(elem)
{
	leparent = elem.parentNode;
	disp = 'none';
	
	if(elem.firstChild.innerHTML == '-')
	{
   		elem.firstChild.innerHTML = '+';
   		elem.lastChild.style.display = 'inline';
	}
	else
	{
   		elem.firstChild.innerHTML = '-';
   		elem.lastChild.style.display = 'none';
   		disp = 'block';
	}
	
	for(var i=1;i<leparent.childNodes.length;i++)
	{
   		leparent.childNodes[i].style.display = disp;
	}
}

window.onload = function()
{
	liens = document.getElementsByName('lesliens');
	for(var i=0;i<liens.length;i++)
	{
   		swap(liens[i]);
   	}
}