var rate = new Array(
 1.000000,      //HRK       0
37.885170,      //HUF index 1
 0.1371365,     //EUR index 2
 3.5627888,     //CZK index 3
 0.2094477,     //CHF index 4
 0.1921411);      //USD index 5


function valuta_pretvori(origin) {
var valuta = eval('document.valuta.c'+origin+'.value');
var kn = rate[origin];
var v;
for (i=0; i<rate.length; i++) {
if (i!=origin) {
v = Math.round(rate[i]*valuta/kn*100)/100;
eval('document.valuta.c'+i+'.value = '+v);
}
}
return true;
}