<!--//
var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;

function hidelayer(lay){
if (ie4) {
document.all[lay].style.visibility = "hidden";}
if (ns4) {
document.layers[lay].visibility = "hide";}
if (ns6) {
document.getElementById(lay).style.visibility = "hidden";}
}

function showlayer(lay){
if (ie4) {
document.all[lay].style.visibility = "visible";}
if (ns4) {
document.layers[lay].visibility = "show";}
if (ns6) {
document.getElementById(lay).style.visibility = "visible";}
}

function showlayers(){
var sIndex = document.formMain.optCategory.selectedIndex;
var sValue = document.formMain.optCategory.options[sIndex].value;
//alert (sValue);
//alert ('sValue:' + sValue);
for (count = 1; count < 12; count++){
hidelayer('layer' + count);
	}

hidelayer('layer1a');
hidelayer('layer1b');
hidelayer('layer4a');
hidelayer('layer4b');
hidelayer('layer4c');
hidelayer('layer4d');
showlayer('layer' + sValue);
}


function showlayers_1(){
if (ie4){
var sIndex = layer1.document.form1.optArtist.selectedIndex;
		var sValue = layer1.document.form1.optArtist.options[sIndex].value; 
	} else if (ns4){
var sIndex = document.layer1.document.form1.optArtist.selectedIndex;
		var sValue = document.layer1.document.form1.optArtist.options[sIndex].value; 
	} else if (ns6){
var sIndex = document.getElementById('optArtist').selectedIndex;
	var sValue = document.getElementById('optArtist').options[sIndex].value; 
	}
	
	if (sValue == "3"){
hidelayer('layer1a');
		hidelayer('layer4a');
		hidelayer('layer4b');
		hidelayer('layer4c');
		hidelayer('layer4d');
		showlayer('layer1b');
	} else{
hidelayer('layer4a');
		hidelayer('layer4b');
		hidelayer('layer4c');
		hidelayer('layer4d');
		hidelayer('layer1b');
		showlayer('layer1a');
	}	
}

function showlayers_4(){
if (ie4){
var sIndex = layer4.document.form4.optEducation.selectedIndex;
		var sValue = layer4.document.form4.optEducation.options[sIndex].value; 
	} else if (ns4){
var sIndex = document.layer4.document.form4.optEducation.selectedIndex;
		var sValue = document.layer4.document.form4.optEducation.options[sIndex].value; 
	} else if (ns6){
var sIndex = document.getElementById('optEducation').selectedIndex;
		var sValue = document.getElementById('optEducation').options[sIndex].value; 
	}

	if (sValue == "1"){
hidelayer('layer1a');
		hidelayer('layer1b');
		showlayer('layer4a');
		hidelayer('layer4b');
		hidelayer('layer4c');
		hidelayer('layer4d');
	} else if (sValue == "2"){
hidelayer('layer1a');
		hidelayer('layer1b');
		hidelayer('layer4a');
		showlayer('layer4b');
		hidelayer('layer4c');
		hidelayer('layer4d');
	} else if (sValue == "3"){
hidelayer('layer1a');
		hidelayer('layer1b');
		hidelayer('layer4a');
		hidelayer('layer4b');
		showlayer('layer4c');
		hidelayer('layer4d');
	} else if (sValue == "4"){
hidelayer('layer1a');
		hidelayer('layer1b');
		hidelayer('layer4a');
		hidelayer('layer4b');
		hidelayer('layer4c');
		showlayer('layer4d');
	}	
}
//-->