var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;
var an=0;
var fot=0;
function showlayer(lay,rut,id) {
if (an == 0){
	if (ie4) {document.all[lay].style.visibility = "visible";
	document.all[lay].style.height='auto';}
	if (ns4) {document.layers['t1'].visibility = "show";}
	if (ns6) {document.getElementById([lay]).style.display = "block";}
}else{
if (ie4) {document.all[an].style.visibility = "hidden";
document.all[an].style.height=3+"px";}
if (ns4) {document.layers[an].visibility = "hide";}
if (ns6) {document.getElementById([an]).style.display = "none";}
if (ie4) {document.all[lay].style.visibility = "visible";
	document.all[lay].style.height='auto';}
	if (ns4) {document.layers['t1'].visibility = "show";}
	if (ns6) {document.getElementById([lay]).style.display = "block";}
}
an=lay;
//////////
if (fot==0){
document.images[id].src=rut+id+'_on'+'.gif';
document.images['fot0'].src=rut+'fot_'+id+'.jpg';
}else{
document.images[fot].src=rut+fot+'_off'+'.gif';
document.images[id].src=rut+id+'_on'+'.gif';
document.images['fot0'].src=rut+'fot_'+id+'.jpg';
}
fot=id;
////
}

function hidelayer2(lay,lay2,lay3,lay4,lay5,lay6) {
if (ie4) {document.all[lay].style.visibility = "hidden";
document.all['t1'].style.height=3+"px";}
if (ie4){document.all[lay2].style.visibility = "hidden";
document.all['t2'].style.height=3+"px";}
if (ie4){document.all[lay3].style.visibility = "hidden";
document.all['t3'].style.height=3+"px";}
if (ie4){document.all[lay4].style.visibility = "hidden";
document.all['t4'].style.height=3+"px";}
if (ie4){document.all[lay5].style.visibility = "hidden";
document.all['t5'].style.height=3+"px";}
if (ie4){document.all[lay6].style.visibility = "hidden";
document.all['t6'].style.height=3+"px";}
if (ns4) {document.layers[lay].visibility = "hide";}
if (ns4) {document.layers[lay2].visibility = "hide";}
if (ns4) {document.layers[lay3].visibility = "hide";}
if (ns4) {document.layers[lay4].visibility = "hide";}
if (ns4) {document.layers[lay5].visibility = "hide";}
if (ns4) {document.layers[lay6].visibility = "hide";}
if (ns6) {document.getElementById([lay]).style.display = "none";}
if (ns6) {document.getElementById([lay2]).style.display = "none";}
if (ns6) {document.getElementById([lay3]).style.display = "none";}
if (ns6) {document.getElementById([lay4]).style.display = "none";}
if (ns6) {document.getElementById([lay5]).style.display = "none";}
if (ns6) {document.getElementById([lay6]).style.display = "none";}
}