create_notice(parent_id,type,elem_id,message)

create_notice(parent_id,type,elem_id,message)

delete_notice(id)

function CreateObject()
 {
 ....
 }

function create_notice(parent_id,type,elem_id,message) 
{
    
    try
      { 
         var parent = document.getElementById(parent_id);
         var new_elem = document.createElement(type);
         new_elem.id=elem_id;
         new_elem.style.color='red';
         var text=message;
         var textNode = document.createTextNode(text);
         parent.appendChild(new_elem);
         new_elem.appendChild(textNode); 
     }   
 catch(e)	
      {
 
      };
}

function delete_notice(id)
 {
   try
   {
        document.getElementById(id).parentNode.removeChild(id);
   } 
  catch(e)	
   {
     alert(id);
   }
 } 

//------------------------------------------------------------------
var http = createObject();
//------------------------------------------------------------------

 function login()
  {
    var email = encodeURI(document.getElementById('id_email').value);
    var nocache= Math.random();
    http.open('get', 'login.php?email='+email+'&nocache' = +nocache,true);
    http.onreadystatechange = loginReply;
    http.send(null);
  }
//--------------------------------------------------------------------
function loginReply()
  {
     var response;
     
    if ( http.readyState ==  4  ) 
      {
       if ( http.status ==  200  ) 
         {  
           response = http.responseText; 
           var data=eval( "(" + response + ")" );
          //----------------------------------
           delete_notice('email_notice'); 
           if  (data.email_notempty==null)//Ответ от php-сценария (JSON) 
              create_notice('email_td','font','email_notice','Заполните поле E-mail.') ;
          //----------------------------------			   
          http = null;     
          http = createObject();
       }         
       else 
         alert( "There was a problem with the URL." );
        }
   };