function clearOnClick (el) {
	if (el.value == 'Ricerca libera')
	  el.value = "";
}//clearOnClick

function clearFieldOnClick (el, str) {
  if (el.value == str)
    el.value = "";
}//clearFieldOnClick

function selectAll (classe, ck) {
 J('.' + classe).each( function () { this.checked=ck;  } ); 
}//selectAll

function switchDivs (divToHide, divToShow) {
  $(divToShow).show();
  $(divToHide).hide();
}//switchDivs

function emptyForm (formId) {
  $$('#' + formId + ' input[type="text"]').each( function(el) { el.value="";} );
  $$('#' + formId + ' textarea').each( function(el) { el.value="";} );
  $$('#' + formId + ' input[type="file"]').each( function(el) { el.value="";} );
}


function fbShare ( id_template, action, url, img ) {
   var dati = {"action": action, "images": [{ "src": img, "href" : url }]};
   FB.Connect.showFeedDialog( id_template, dati);
}//fbShare

function fbShareComment ( id_template, action, elem, url, img ) {
   var dati = {"action": action + " " + "<a href='"+url+"'>"+elem+"</a>" , "images": [{ "src": img, "href" : url }]};
   FB.Connect.showFeedDialog( id_template, dati);
}//fbShare