function LTrim(str)
{
        var whitespace = new String(" \t\n\r ");
        // last space character is not a space, but alt+0160,
        // another invisible char.
        var s = new String(str);
        if (whitespace.indexOf(s.charAt(0)) != -1) {
            // We have a string with leading blank(s)...
            var j=0, i = s.length;
            // Iterate from the far left of string until we
            // don't have any more whitespace...
            while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
                j++;
            // Get the substring from the first non-whitespace
            // character to the end of the string...
            s = s.substring(j, i);
        }
        return s;
}
// Trims all spaces to the right of a specific string
function RTrim(str)
{
        // We don't want to trip JUST spaces, but also tabs,
        // line feeds, etc.  Add anything else you want to
        // "trim" here in whitespace
        var whitespace = new String(" \t\n\r ");
        // last space character is not a space, but alt+0160,
        // another invisible char.
        var s = new String(str);
        if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {
            // We have a string with trailing blank(s)...
            var i = s.length - 1;       // Get length of string
            // Iterate from the far right of string until we
            // don't have any more whitespace...
            while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
                i--;
            // Get the substring from the front of the string to
            // where the last non-whitespace character is...
            s = s.substring(0, i+1);
        }
        return s;
}
                                                                                                                        
// Trims all spaces to the left and right of a specific string by calling RTim
// and LTrim
function Trim(str)
{
        return RTrim(LTrim(str));
}

function CheckFields()
	{
		var errmsg="";
		var c1=document.contatti.nome.value;
		var c2=document.contatti.cognome.value;
		var c3=document.contatti.citta.value;
		var c4=document.contatti.email.value;
		var c5=document.contatti.messaggio.value;
		var c6=document.contatti.accetto;
		

		if ((Trim(c1) == '')||(Trim(c2) == '')||(Trim(c3) == '')||(Trim(c4) == '')||(Trim(c5) == ''))
		{
			errmsg = errmsg + "Inserisci i seguenti campi:\n";
			if (Trim(c1) == '')	errmsg = errmsg + "\nNome"
			if (Trim(c2) == '')	errmsg = errmsg + "\nCognome"
			if (Trim(c3) == '')	errmsg = errmsg + "\nCitta'"
			if (Trim(c4) == '')	errmsg = errmsg + "\nE-Mail"
			if (Trim(c5) == '')	errmsg = errmsg + "\nMessaggio"		
		}

		//controllo EMAIL
if ((c4.length<6) || (c4.indexOf(",")>=0) || (c4.indexOf(";")>=0) || (c4.indexOf(":")>=0) || (c4.indexOf("/")>=0) || (c4.indexOf(" ")>=0) || (c4.indexOf("@")<=0) || (c4.indexOf("@") != c4.lastIndexOf("@")) || (c4.lastIndexOf(".")<c4.indexOf("@")) || ((c4.lastIndexOf(".")+3)>c4.length)) errmsg = errmsg + "\nFormato Email non corretto";
		
	
		if (errmsg != '')
		{
			alert(errmsg);
		} else {
				if (!c6.checked) {
					alert("Attenzione, e' necessario autorizzare il trattamento dei dati personali");
				}else{
					//alert("Procedo alla registrazione.");
					document.contatti.submit();
				}
		}		
}