var ifNN=document.layers ? true : false;
var ifDOM=document.getElementById ? true : false;
var hideName=ifNN ? "hide" : "hidden";
var showName=ifNN ? "show" : "visible";

function genLayer(sName, sLeft, sTop, sWdh, sHgt, sVis, copy) 
{		
	if (ifNN && !ifDOM) 
		document.writeln('<LAYER NAME="' + sName + '" LEFT=' + sLeft + ' TOP=' + sTop + 
		' WIDTH=' + sWdh + ' HEIGHT=' + sHgt + ' VISIBILITY="' + sVis + '"' + '>' + copy + '</LAYER>');
	else 
		document.writeln('<DIV ID="' + sName + '" STYLE="position:absolute; overflow:none; left:' + 
		sLeft + 'px; top:' + sTop + 'px; width:' + sWdh + 'px; height:' + sHgt + 'px;' + 
		' visibility:' + sVis + '">' + copy + '</DIV>');
}
function refLayer(name)
{	
	if (ifNN)
		return document.layers[name];
	else
		return eval('document.all.'+name+'.style');
}
function hideLayer(name)
{
	refLayer(name).visibility=hideName;
}
function showLayer(name)
{
	refLayer(name).visibility=showName;
}