/*
Form field Limiter script- By Dynamic Drive
For full source code and more DHTML scripts, visit http://www.dynamicdrive.com
This credit MUST stay intact for use
*/

function restrictinput(maxlength,e,placeholder){
	if (window.event&&event.srcElement.value.length>=maxlength)
		return false
	else if (e.target&&e.target==eval(placeholder)&&e.target.value.length>=maxlength){
		var pressedkey=/[a-zA-Z0-9\.\,\/]/ //detect alphanumeric keys
		if (pressedkey.test(String.fromCharCode(e.which)))
		e.stopPropagation()
	}
}

function countlimit(maxlength,e,placeholder){
	var theform=eval(placeholder)
	var lengthleft=maxlength-theform.value.length
	var placeholderobj=document.all? document.all[placeholder] : document.getElementById(placeholder)
	if (window.event||e.target&&e.target==eval(placeholder)){
		if (lengthleft<0)
			theform.value=theform.value.substring(0,maxlength)
			placeholderobj.innerHTML=lengthleft
	}
}


function displaylimit(thename, theid, thelimit){
	var ns6=document.getElementById&&!document.all
	
	var theform = theid!=""? document.getElementById(theid) : thename
	if (document.getElementById(theid)) {
		init = document.getElementById(theid).value.length;
	} else {
		init = 0;	
	}
	var limit_text='Caratteri disponibili: <b><span id="'+theform.toString()+'">'+(thelimit-init)+'</span></b>'
	if (document.all||ns6)
		document.write(limit_text)
		if (document.all){
			eval(theform).onkeypress=function(){ return restrictinput(thelimit,event,theform)}
			eval(theform).onkeyup=function(){ countlimit(thelimit,event,theform)}
		}
	else if (ns6){
		document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
		document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
	}
}


function checkemail(email) {
	var ok=true;
	var pe = email.indexOf('.');
	var ss = email.indexOf(' ');
	var lch = email.length-1;
	var atr = email.indexOf('@');
	var att = atr+1;
	var sq = email.substring(0,atr); 
	var sw = email.substring(atr,pe); 
	var se = email.substring(pe,lch);

	return !((atr<1) || (pe==lch) || (pe<1)  || (ss != -1) || (sq.length<=2) || (sw.length<=3) || (se.length<=1));
}