function nascondiUsername(){
	document.getElementById('scrittaUsername').style.display='none';
	if(document.login.password.value==''){
	document.getElementById('scrittaPassword').style.display='inline';
	}
}

function mostraUsername(){
	if(document.login.username.value==''){
	document.getElementById('scrittaUsername').style.display='inline';
	}
}

function nascondiPassword(){
	document.getElementById('scrittaPassword').style.display='none';
	if(document.login.username.value==''){
	document.getElementById('scrittaUsername').style.display='inline';
	}
}

function mostraPassword(){
	if(document.login.password.value==''){
	document.getElementById('scrittaPassword').style.display='inline';
	}
}





function checkNumeroParole(form){
var keywords=form.q.value;
keywords = keywords.replace(/[\']/g," ") 
keywords = keywords.replace(/[,]/g," ") 
keywords = keywords.replace(/[.]/g," ") 
keywords = keywords.replace(/[?]/g," ") 
keywords = keywords.replace(/[!]/g," ") 
keywords = keywords.replace(/["]/g," ") 

var keywordArray = "";
keywordArray = keywords.split(" ");

	if (keywordArray.length == 0) {
	alert("\n\nAttenzione!\n\n E\' necessario inserire almeno 3 parole del testo latino di cui si sta cercando la traduzione\n\n");
	form.q.focus();
  	return false;

	}
	else if(keywordArray.length < 3){
	alert("\nAttenzione!\n\n\nE\' necessario inserire almeno 3 parole del\ntesto latino di cui si sta cercando la traduzione\n\n");
	form.q.focus();
  	return false;
	}
	else{
	return true;
	}
}




/* DHTML */

nereidFadeObjects = new Object();
nereidFadeTimers = new Object();

function nereidFade(object, destOp, rate, delta){
	if (!document.all) {
	return
	}
	if (object != "[object]"){  //do this so I can take a string too
		setTimeout("nereidFade("+object+","+destOp+","+rate+","+delta+")",0);
		return;
	}
	clearTimeout(nereidFadeTimers[object.sourceIndex]);
	diff = destOp-object.filters.alpha.opacity;
	direction = 1;
	if (object.filters.alpha.opacity > destOp){
		direction = -1;
	}
	delta=Math.min(direction*diff,delta);
	object.filters.alpha.opacity+=direction*delta;
	if (object.filters.alpha.opacity != destOp){
		nereidFadeObjects[object.sourceIndex]=object;
		nereidFadeTimers[object.sourceIndex]=setTimeout("nereidFade(nereidFadeObjects["+object.sourceIndex+"],"+destOp+","+rate+","+delta+")",rate);
	}
}



/* Firefox */
// Created by http://www.mozillaitalia.org/sherlock/
function addEngine()
{
  if ((typeof window.sidebar == "object") && (typeof
  window.sidebar.addSearchEngine == "function"))
  {
    //cat="Web";
    cat=prompt("In what category should this engine be installed?","Web")
    window.sidebar.addSearchEngine(
      "http://www.latin.it/search_provider/latin_it.src",
      "http://www.latin.it/search_provider/icona-16x16.gif",
      name,
      cat );
  }
  else
  {
    alert("I plugin di ricerca sono installabili solo in Firefox, Mozilla e Netscape 6+.");
  }
}