/**
 * js function
 */
var isMinNS4 = document.layers
var ie=document.all&&navigator.userAgent.indexOf("Opera")==-1
var dom=document.getElementById&&!ie&&navigator.userAgent.indexOf("Opera")==-1
function hide(layer) 
{
	if (isMinNS4) 
	{
		layer.visibility = "hide";
	} else if (ie||dom)
	{
		layer.style.visibility = "hidden";
	} else
	{
		try{layer.style.visibility = "hidden";}catch(e){}
	}
}
function show(layer) 
{
	if (isMinNS4)
	{
		layer.visibility = "show";
	} else if (ie||dom)
	{
		layer.style.visibility = "visible";
	} else
	{
		try{layer.style.visibility = "visible"}catch(e){}
	}
}