/* Copyright(C) 2005 Salvatore Sanfilippo <antirez@gmail.com>
 * All Rights Reserved. */

function validate(string, regexp, err, fieldName) {
    if (string.match(regexp) == null) {
        alert(err);
        warnField(fieldName);
        return false;
    }
    return true;
}

function validateEmpty(string,err,filedName) {
    return validate(string, "^.*[^ ]+.*$", err, filedName);
}

function validateTaglist(string,err,filedName) {
    return validate(string, "^.*[^, ]+.*$", err, filedName);
}

function isValidEmail(a)
{
        var at = a.indexOf("@");
        var name = a.substring(0, at);
        var isp = a.substring(at + 1, a.length);
        var dot = a.lastIndexOf(".");
        if (at == -1 || at == 0 || name == "" || isp == "" || dot == -1 ||
dot== (a.length - 1))
        {
                return false;
        }
        return true;
}

function warnField(fieldName)
{
    eval("document.f."+fieldName+".style.border='2px red solid'");
    eval("document.f."+fieldName+".focus();");
}

function hideElementById(name)
{
    var ele = document.getElementById(name);
    ele.style.visibility = 'hidden';
    ele.style.display = 'none';
}

function showElementById(name)
{
    var ele = document.getElementById(name);
    ele.style.visibility = 'visible';
    ele.style.display = 'block';
}

function toggleElementById(name)
{
    var ele = document.getElementById(name);
    if (ele.style.visibility == 'visible') {
        hideElementById(name);
    } else {
        showElementById(name);
    }
}

function clearFields(fields, hidelist) {
    for (i = 0; i < fields.length; i++) {
        eval("document.f."+fields[i]+".style.border='1px black solid'");
    }
    if (hidelist != null) {
        for (i = 0; i < hidelist.length; i++) {
            hideElementById(hidelist[i]);
        }
    }
}

function areyousure(message) {
    return confirm(message + ": sei sicuro?");
}