IE4 = (document.all) ? 1 : 0;
NS4 = (document.layers) ? 1 : 0;

function showlayer(name){
if(IE4){

ien= eval("document.all." + name + ".style")
ien.visibility="visible"

}
else{

ien=eval("document." + name)
ien.visibility="visible"
}
}

function hidelayer(name){
timerid=setTimeout('hide("' + name + '")', 5000);
}

function hideall(){

if(IE4){
 divs = document.all.tags("DIV");
 for(var i=0;i<divs.length;i++){
 divs(i).style.visibility = "hidden";
 }
 }
else if(NS4) {
 for(var i=0;i<document.layers.length;i++) {
 document.layers[i].visibility = "hidden";
 }
 }

}

function hide(name){
if(IE4){
ien= eval("document.all." + name + ".style")
}
else{
ien=eval("document." + name)
}
ien.visibility="hidden"
}