// JavaScript Document
function valid()
{
   var f = document.appl_form;
  if(!empty_username(f.username,"Username")||!empty_password(f.password,"Password"))
   {

   return false;              
  }
  return true; 
}


function empty_username(name,id)
{ 
 var  field=name.value;
  if(field == "")
  { 
     alert("Please enter " + id);
     name.focus();
     return false;  
  }
 
  return true;
}




function empty_password(name,id)
{ 
 var  field=name.value;
  if(field == "")
  { 
     alert("Please enter " + id);
     name.focus();
     return false;  
  }
 
  return true;
}