var state = 'block'; 
var lNum = 100;
function showhide(layer_ref) { 
	// close all the query div tags first
	for (i=1; i<=lNum; i++) {
		l_ref = "a"+i;
		if (document.all) { //IS IE 4 or 5 (or 6 beta) 
			if (eval("document.all." + l_ref) == "[object DIV]" || eval("document.all." + l_ref) == "[object]") {
				eval("document.all." + l_ref + ".style.display = 'none'");
			} else {
				i = lNum;
			}
		}  
		if (document.getElementById &&!document.all) {
			hza = document.getElementById(l_ref); 
			if(hza !== null) {
				hza.style.display = "none";
			} else {
				i = lNum;
			}
		} 
	}
	// now open the others
	if (document.all) { //IS IE 4 or 5 (or 6 beta) 
		eval( "document.all." + layer_ref + ".style.display = state"); 
		eval( "document.all.answers.style.display = state"); 
		
	} 
	if (document.layers) { //IS NETSCAPE 4 or below 
		document.layers[layer_ref].display = state; 
		document.layers["answers"].display = state;
	} 
	if (document.getElementById &&!document.all) { 
		hza = document.getElementById(layer_ref); 
		hza.style.display = state; 
		hza = document.getElementById("answers"); 
		hza.style.display = state; 
	} 
}

function hideAnswers(lRef) { 
	if (document.all) { //IS IE 4 or 5 (or 6 beta) 
		eval( "document.all." + lRef + ".style.display = 'none'"); 
	} 
	if (document.layers) { //IS NETSCAPE 4 or below 
		document.layers[lRef].display = "none"; 
	} 
	if (document.getElementById &&!document.all) { 
		hza = document.getElementById(lRef); 
		hza.style.display = "none";
	} 
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}