<!--//


function funkcja(id) {
   if(document.getElementById) {
      element = document.getElementById(id);
   } else if(document.all) {
      element = document.all[id];
   } else return;

   if(element.style) {
      if(element.style.display == 'block' ){
         element.style.display = 'none';
      } else {
         element.style.display = 'block';
      }
   }
}

function check_email(email) {
   invalid = " /:,;";
   if(email == "") { return false }
   for(i=0; i < invalid.length; i++) {
      bad = invalid.charAt(i);
      if (email.indexOf (bad, 0) != -1) { return false }
   }
   at = email.indexOf("@", 0);
   if( (at == -1) || (at == 0) ) { return false }
   if(email.indexOf("@", at+1) != -1) { return false }
   period = email.indexOf(".", at);
   if( (period == -1) || (period == at+1) ) { return false }
   if(period+3 > email.length == -1) { return false }
   return true;
}

function displayWindow(url, width, height) { 
        var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=no,menubar=no' ); 
}


function newsletter(form) {
        if(document.getElementById('mail').value=='') {
           alert('Podałeś pusty adres e-mail');
           return false;
        } else if(check_email(document.getElementById('mail').value)==false) {   
           alert('Musisz podać prawidłowy adres e-mail');
           return false;
        } else {
           form.action = 'http://www.jw-toner.com/pl/8/'           
           return true;
        }           
}


//-->