function getE(id) {
	return document.getElementById(id);
}

function MM_preloadImages() { //v3.0
	var d=document;
	if(d.images) {
		if(!d.MM_p) {d.MM_p=new Array();}
		var i,j=d.MM_p.length,a=MM_preloadImages.arguments;
		for(i=0; i<a.length; i++) {
			if (a[i].indexOf("#")!=0) {
				d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];
			}
		}
	}
}

function MM_swapImgRestore() { //v3.0
	var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) {x.src=x.oSrc;}
}

function MM_findObj(n, d) { //v4.01
	var p,i,x;
	if(!d) {d=document;}
	if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document;
		n=n.substring(0,p);
	}
	
	if(!(x=d[n])&&d.all) {x=d.all[n];}
	for (i=0;!x&&i<d.forms.length;i++) {x=d.forms[i][n];}
	for(i=0;!x&&d.layers&&i<d.layers.length;i++) {x=MM_findObj(n,d.layers[i].document);}
	if(!x && d.getElementById) {x=d.getElementById(n);}
	
	return x;
}

function MM_swapImage() { //v3.0
	var i,j=0,x,a=MM_swapImage.arguments;
	document.MM_sr=new Array;
	for(i=0;i<(a.length-2);i+=3) {
		if ((x=MM_findObj(a[i]))!=null) {
			document.MM_sr[j++]=x;
			if(!x.oSrc) {x.oSrc=x.src;}
			x.src=a[i+2];
		}
	}
}


mw=null;
function openWindowDimBars(FileName,w,h,barre) {
	myWindow=window.open(FileName,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars='+barre+',resizable=0,top=10,left=10,width='+w+',height='+h);
	return myWindow;
}

var testresults;
function checkemail(email_addr) {
	var filter=/^[\'+\\./0-9A-Z^_\`a-z{|}~\-]+@[a-zA-Z0-9_\-]+(\.[a-zA-Z0-9_\-]+){1,3}$/i;
	if (filter.test(email_addr)) {
		testresults = true;
	}
	else{
		testresults = false;
	}
	return(testresults);
}

/*
	Inserisce dinamicamente un filmato Flash.
	Per scavalcare il blocco di IE 6, che altrimenti ne richiede l'attivazione manuale.
*/
function print_flash_movie(nomefile, width, height, version) {
	var str;
	
	str = ('<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=' + version + '" ID="ticker_news" WIDTH="' + width + '" HEIGHT="' + height + '">');
	str = str + ('<PARAM NAME=movie VALUE="' + nomefile + '">');
	str = str + ('<PARAM NAME=quality VALUE=high>');
	str = str + ('<embed src="' + nomefile + '" quality=high ');
	str = str + ('swLiveConnect="FALSE" WIDTH="' + width + '" HEIGHT="' + height + '" border="0" TYPE="application/x-shockwave-flash"');
	str = str + ('PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></embed></OBJECT>');
	
	document.write(str);
}

// form di ricerca semplice - vuota il campo di ricerca se contiene la frase di default "inserisci una frase"
function search_form_check_content(obj, check_word) {
	if (isObject(obj) && check_word!="") {
		if (obj.value==check_word) {
			obj.value = "";
		}
	}
}

function isFunction(a) {
	return typeof a == 'function';
}

function isObject(a) {
	return (a && typeof a == 'object') || isFunction(a);
}

// controlla se una stringa rappresenta una password valida; solo alfanumerica e con un numero minimo e massimo di caratteri
function is_valid_password(str, min_chars, max_chars) {
	var filter=/^[a-z0-9]{1,}$/i;
	if (filter.test(str) && str.length>=min_chars) {
		if (max_chars>=min_chars) {
			if (str.length<=max_chars) {
				return true;
			}
			else {
				return false;
			}
		}
		else {
			return true;
		}
	}
	else {
		return false;
	}
}

function get_hint(id, l) {
	if (isObject(getE("hint_content_"+id))) {
		Tip(getE("hint_content_"+id).innerHTML);
	}
	else {
		var oXmlHttp = zXmlHttp.createRequest();
		oXmlHttp.open("get", 'do_ajax.php?id='+id+'&l='+l, true);
		oXmlHttp.onreadystatechange = function() {
			if (oXmlHttp.readyState == 4) {
				if (oXmlHttp.status == 200) {
					var response = oXmlHttp.responseText;
					if (response.length>0) {
						Tip(response);
					}
				}
			}
		};
		
		oXmlHttp.send(null);
	}
}

function confirmLink(theLink, confirmMsg) {
	if (typeof(window.opera) != 'undefined') {
		return true;
	}
	
	var is_confirmed = confirm(confirmMsg);
	
	return is_confirmed;
}