function getObj(name)
{
if (document.getElementById)
{
return document.getElementById(name);
}
else if (document.all)
{
return document.all[name];
}
else if (document.layers)
{
return document.layers[name];
}
else return false;
}



function sub(a,b){
var x=getObj(a+'-'+b);
x.style.display="";
prev=a+'-'+b;
//var y=getObj("ide");
//y.innerHTML=x;
}

function d(a,b){
var y=getObj(prev);
y.style.display="none";

var x=getObj(a+'-'+b);
x.style.display="";
prev=a+'-'+b;
}

function nul(a,b){
}