if (navigator.appName == "Netscape") {
	layerRef="document.layers";


  	styleSwitch="";
    } else {
    	layerRef="document.all";
    	styleSwitch=".style";
    }

function showLayer(layerName) 
{
	if(typeof(document.layers)!= "undefined")
 		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.display="block"');
	else
		document.getElementById(layerName).style.display="block";
}
  	
function hideLayer(layerName) 
{
	if(typeof(document.layers)!= "undefined")
 		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.display="none"');
	else
		document.getElementById(layerName).style.display="none";
}

function hide_all_layers(except_this)
{
	for (var k = 1; k < 50; k ++) {
		if (document.getElementById("map" + k)) {
			if (k != except_this) hideLayer("map" + k);
		}
	}
}

ns=10;
layerRef="document.all"
styleSwitch=".style"
if (navigator.appName == "Netscape") {
	ns=1;
	layerRef="document.layers"
  	styleSwitch=""
}

function sety(layerName,y) {
 	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.top='+y);
}