function enable_view(id)
{
	document.getElementById(id).style.display='inline';
}
function disable_view(id)
{
	document.getElementById(id).style.display='none';
}

var act_shown_layer;
function show_layer(name)
{	
	act_shown_layer=name;	
	document.getElementById(name).style.display='inline';
}

function hide_layer(name)
{	
	if(name)
		document.getElementById(name).style.display='none';
}

function hide_show_layer(name)
{
	if (act_shown_layer)
		hide_layer(act_shown_layer);
	show_layer(name);
}

function case_active_show_layer(self,name)
{
	if (self.checked == true)
		document.getElementById(name).style.display='inline';
	else
		document.getElementById(name).style.display='none';		
}