function show(layerid)
{
if (document.getElementById) // IE and NS6
{
elm=document.getElementById(layerid)
if(elm.style.visibility=="visible")
{
elm.style.visibility="hidden"
}
else
{
elm.style.visibility="visible"
}
}
if(document.layers)
{
obj=eval("document."+layerid)
if(obj.visibility=="show")
{
obj.visibility="hide"
}
else
{
obj.visibility="show"
}
}
}