function valida(f) {
        if (f.rut.value=="" || f.password.value=="") {

                alert("Ingrese todos los campos");

                return false;

        }

		formatea(f)
        f.username.value = f.rut.value; // +'-'+f.dv.value;

        return true;

}

function formatea(f) {
	rut = f.rut.value
	if(rut.indexOf('-')<0) {
		aux=rut.substr(0,rut.length-1)
		aux=aux + '-' + rut.substr(rut.length-1,1)
		
		f.rut.value=aux
	}
}

 function valida2(){
  if(document.versaba.nickName.value=="" || document.versaba.email.value==""){
   if(document.versaba.nickName.value=="" && document.versaba.email.value=="")
   {
     alert("Ingrese los campos solicitados");
	 document.versaba.nickName.focus();
	 return false;
	}   
     if(document.versaba.nickName.value=="" && document.versaba.email.value!=""){
	  alert("Ingrese su nombre");
	  document.versaba.nickName.focus();
	  return false;
	 }
	 if(document.versaba.email.value=="" && document.versaba.nickName.value!=""){
	  alert("Ingrese su Email");
	  document.versaba.email.focus();
	  return false;
	 }
   }
   
    if(document.versaba.nickName.value!="" && document.versaba.email.value!=""){
	  if (isEmailAddress()==false){
	   alert("Email no válido");
	   document.versaba.email.focus();
	   return false;
	  } else{
	   return true;
	  }
	}
  
 } 
 
 function isEmailAddress()
{
  var s=document.versaba.email.value;
   var filter=/^[A-Za-z][A-Za-z0-9_.]+[A-Za-z][A-Za-z0-9_.]*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
     if (filter.test(s)){
       return true;
     }else{
      return false;
     }
 }