<!--

var isNS4 = document.layers ? 1 : 0;
var isIE4 = document.all ? 1 : 0;
var isW3C = document.getElementById ? 1 : 0;


var timerID;
var oldText;

function hideAll(){
	for(i=1;i<=4;i++){
		if (isNS4) {
			eval("document.roll"+i+".visibility = 'hide'");
		} else if (isIE4) {
			eval("document.all.roll"+i+".style.visibility = 'hidden'");
		} else if (isW3C) {
			eval("document.getElementById('roll"+i+"').style.visibility = 'hidden'");
		}
	}
	if (isNS4) {
		document.rollATW.visibility = 'hide';
		document.rollWHC.visibility = 'hide';
	} else if (isIE4) {
		document.all.rollATW.style.visibility = 'hidden';
		document.all.rollWHC.style.visibility = 'hidden';
	} else if (isW3C) {
		document.getElementById('rollATW').style.visibility = 'hidden';
		document.getElementById('rollWHC').style.visibility = 'hidden';
	}
}

function showContents() {
clearTimeout(timerID);
	if (isNS4) {
		eval("document.contents_menu.visibility = 'show'");
	} else if (isIE4) {
		eval("document.all.contents_menu.style.visibility = 'visible'");
	} else if (isW3C) {
		eval("document.getElementById('contents_menu').style.visibility = 'visible'");
	}
}
function hideContents(){
 timerID = setTimeout('hideContents2()',500)
}
function hideContents2(){
clearTimeout(timerID);
	 if (isNS4) {
		eval("document.contents_menu.visibility = 'hide'");
	} else if (isIE4) {
		eval("document.all.contents_menu.style.visibility = 'hidden'");
	} else if (isW3C) {
		eval("document.getElementById('contents_menu').style.visibility = 'hidden'");
	}
} 

function showText(newText){
	if(isNS4){
		eval("document."+oldText+".visibility = 'hidden'");
		eval("document."+newText+".visibility = 'visible'");
	} else if(isIE4){
		eval("document.all."+oldText+".style.visibility = 'hidden'");
		eval("document.all."+newText+".style.visibility = 'visible'");
	} else if(isW3C){
		eval("document.getElementById('"+oldText+"').style.visibility = 'hidden'");
		eval("document.getElementById('"+newText+"').style.visibility = 'visible'");
	}
	oldText = newText;
	document.location = "#top";
}

//-->