var NS4 = (document.layers)?true:false;
var MSIE = (document.all)?true:false;
var NS6 = (navigator.userAgent.indexOf("Gecko")> 0)?1:0;
var validdata;

function checkValid(form_name, ind) {
 validdata=true;
 for (i= 1; i< ind; i++){
  if (eval('(document.'+ form_name+ '.elements[i].name).substring(0, 5)== "oblig"')) {
   nomeimg=eval('document.'+ form_name+ '.elements[i].name');
   document.images[nomeimg].src='puntinografico.gif';
  }
  if ((eval('(document.'+ form_name+ '.elements[i].name).substring(0, 5)== "oblig"')) &&
      ((eval('(document.'+ form_name+ '.elements[i].value)== ""')) || (eval('(document.'+ form_name+ '.elements[i].value)== "---"')))) {
   validdata= false;
   stringa= eval("document."+ form_name+ ".elements[i].name.length");
   window.alert("Required Field: "+ (eval("(document."+ form_name+ ".elements[i].name).substring(5, stringa)")));
   document.images[nomeimg].src= 'puntinograficoan.gif';
   eval("document."+ form_name+ ".elements[i].focus()");
   return false;
  }
 }
 if (validdata) {
  eval("document."+ form_name+ ".submit()");
 }
 return false
}