<!--//
function Dsy() 
{ 
this.Items = {}; 
} 
Dsy.prototype.add = function(id,iArray) 
{ 
this.Items[id] = iArray; 
} 
Dsy.prototype.Exists = function(id) 
{ 
if(typeof(this.Items[id]) == "undefined") return false; 
return true; 
}

function change(v){ 
var str="0"; 
for(i=0;i<v;i++){ str+=("_"+(document.getElementById(s[i]).selectedIndex-1));}; 
var ss=document.getElementById(s[v]); 
with(ss){ 
length = 0; 
options[0]=new Option(opt0[v],opt0[v]); 
if(v && document.getElementById(s[v-1]).selectedIndex>0 || !v) 
{ 
   if(dsy.Exists(str)){ 
    ar = dsy.Items[str]; 
    for(i=0;i<ar.length;i++)options[length]=new Option(ar[i],ar[i]); 
    if(v)options[1].selected = true; 
   } 
} 
if(++v<s.length){change(v);} 
}
}

var dsy = new Dsy();
//-->