var tm = false;
var tmr = "null"


function timer() {

		if (tm){ 
		clearTimeout(tmr);
 		tm = false;}
		tmr=setTimeout("javascript:hideAll();",3500);
		tm =true
	}

function init(){
if (navigator.appName == "Netscape") {
	layerStyleRef="layer.";
 	layerRef="document.layers";
 	styleSwitch="";
	visibleVar="show";
}else{
 	layerStyleRef="layer.style.";
 	layerRef="document.all";
 	styleSwitch=".style";
 	visibleVar="visible";
 	}
 }
 
 function showHideLayerSwitch(layerName){
 	if (eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility=="visible"')){
 		hideAll();
 		hideLayer(layerName);
 	}else{
 		hideAll();
 		showLayer(layerName);
 	}
}
 
function showLayer(layerName){
 	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
 	}
 	
function hideLayer(layerName,layerLink){
 	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
 	}
 
function hideAll(){
 	eval(layerRef+'["bio"]'+styleSwitch+'.visibility="hidden"');
	eval(layerRef+'["news"]'+styleSwitch+'.visibility="hidden"');
	//eval(layerRef+'["speech"]'+styleSwitch+'.visibility="hidden"');
	eval(layerRef+'["saveplanet"]'+styleSwitch+'.visibility="hidden"');
	eval(layerRef+'["presentation"]'+styleSwitch+'.visibility="hidden"');
	eval(layerRef+'["contact"]'+styleSwitch+'.visibility="hidden"');
}