function onTextGotFocus(txtControl, defaultText){
  if(txtControl.value==defaultText) txtControl.value='';
}
function onTextLostFocus(txtControl, defaultText){
  if(txtControl.value=='') txtControl.value=defaultText;
}

function urlencode(str) {
str = escape(str);
str = str.replace('+', '%2B');
str = str.replace('%20', '+');
str = str.replace('*', '%2A');
str = str.replace('/', '%2F');
str = str.replace('@', '%40');
return str;
}

function findProducts(){
  var txt=document.formHeaderFind.txtFindProduct.value;
  window.location.href='/artfind.php?rtxt' + txt;
}

function IscriviNewsletter(){
  if(document.frmNewsletter.news_nome.value=='' || document.frmNewsletter.news_nome.value=='nome e cognome'){
    window.alert('Indicare il proprio nome e cognome');
    return false;
  }
  
  var r = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
  if(!r.test(document.frmNewsletter.news_email.value)){
    window.alert('Indicare il proprio indirizzo email');
    return false;
  }
  if(!(window.confirm('Iscriversi alla newsletter con i dati forniti?'))) return false;
  
  window.open('/newsletter_registra.php?txtNewsletterNome=' + urlencode(document.frmNewsletter.news_nome.value) + '&txtNewsletterEmail=' + urlencode(document.frmNewsletter.news_email.value),'Newsletter','left=100, top=100, width=320, height=240');
  return false;
}