var old;
var memold;
var subold;
 if(document.layers)
 {
  window.captureEvents(Event.MOUSEDOWN);
  window.onmousedown=do_out;
 } else                                                                                                                                        
 {
document.onmouseup=do_out;       
}

function show_layer(x)
{
	if(document.layers)
		document.layers[x].visibility="show";
	else
		document.all[x].style.visibility="visible";
}

function hide_layer(x)
{
	if(document.layers)
		document.layers[x].visibility="hide";
	else
		document.all[x].style.visibility="hidden";
}

function do_check(x)
{
    show_layer(x);
	if(old && old!=x)
	{
		hide_layer(old);
	}
		old=x;
}

function do_out()
{
	if(old)
	{
		hide_layer(old);
	memold=old; old="";
	}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function winop(url,width,height)
{
windop = window.open(url,"mywin","height="+height+",width="+width+",left=200,top=150");
}