function verifica_login()
 {
   var username = document.form_login.username.value;
   var parola = document.form_login.password.value;
   
   if (username == "" )
   {
     alert("    Introduceti Username!    ");
     document.form_login.username.focus();
     return false;
   }
/*   
   if (username.length < 4 || username.length > 12)
   {
     alert("    Introduceti corect Username-ul!    ");
     document.form_login.username.focus();
     return false;
   }
*/ 
   if (parola == "" )
   {
     alert("    Introduceti Parola!    ");
     document.form_login.password.focus();
     return false;
   } 
/*   
   if (parola.length < 6 || parola.length > 12)
   {
     alert("    Introduceti corect Parola!    ");
     document.form_login.password.focus();
     return false;
   } 
*/
   return true;
 }