function hide(id)
	{
		if(window.document.getElementById)
			{window.document.getElementById(id).style.visibility = "hidden";}
		else if(window.document.layers)
			{window.document.layers[id].visibility = "hidden";}
		else if(window.document.all)
			{window.document.all[id].style.visibility = "hidden";}
	}
function show(id)
	{
		hide_onload();
		if(window.document.getElementById)
			{window.document.getElementById(id).style.visibility = "visible";}
		else if(window.document.layers)
			{window.document.layers[id].visibility = "visible";}
		else if(window.document.all)
			{window.document.all[id].style.visibility = "visible";}
	}
function hide_onload()
	{
		hide("_10");
		hide("_8");
		hide("_7");
		hide("_6");
	}