/* ---------------------------- */
/* SHOW-HIDE Layer				*/
/* ---------------------------- */


function showlayer(layer)
{
	var myLayer1=document.getElementById('sm_1');
	var myLayer2=document.getElementById('sm_2');
	var myLayer3=document.getElementById('sm_3');
	
	if(layer=='sm_1')
	{
		myLayer1.style.display="block";
		myLayer2.style.display="none";
		myLayer3.style.display="none";
	}
	if(layer=='sm_2')
	{
		myLayer1.style.display="none";
		myLayer2.style.display="block";
		myLayer3.style.display="none";
	}
	if(layer=='sm_3')
	{
		myLayer1.style.display="none";
		myLayer2.style.display="none";
		myLayer3.style.display="block";
	}
}

function hiddenlayer(layer)
{
	var myLayer1=document.getElementById('sm_1');
	var myLayer2=document.getElementById('sm_2');
	var myLayer3=document.getElementById('sm_3');
	
	myLayer1.style.display="none";
	myLayer2.style.display="none";
	myLayer3.style.display="none";
}