var tabs = new Array('introduction', 'ministry', 'services', 'news', 'media', 'contacts');

function showTab(tab)
{
    for(var i = 0;i < tabs.length;i++)
    {
        document.getElementById(tabs[i]).style.display = 'none';
        document.getElementById(tabs[i] + 'tab').style.backgroundImage = 'url(/files/tab-gradient.jpg)';
    }

    document.getElementById(tab).style.display = 'block';
    document.getElementById(tab + 'tab').style.backgroundImage = 'url(/files/tab-open.jpg)';
}

function hoverTab(tab)
{
    for(var i = 0;i < tabs.length;i++)
    {
        if(document.getElementById(tabs[i] + 'tab').style.backgroundImage == '')
            document.getElementById(tabs[i] + 'tab').style.backgroundImage = 'url(/files/tab-gradient.jpg)';

        if(document.getElementById(tabs[i] + 'tab').style.backgroundImage.indexOf('open') == -1)
        {
            if(document.getElementById(tabs[i] + 'tab').style.backgroundImage.indexOf('gradient') != -1 && tabs[i] == tab)
                document.getElementById(tab + 'tab').style.backgroundImage = 'url(/files/tab-hover.jpg)';
            else
                document.getElementById(tabs[i] + 'tab').style.backgroundImage = 'url(/files/tab-gradient.jpg)';
        }
    }
}

function validateForm()
{
    var form = document.getElementById('contactForm');

    if(form.name.value.length == 0 || form.email.value.length == 0 || form.message.value.length == 0)
        alert('Please fill in all fields');
    else if(form.email.value.indexOf('.') > 2 && form.email.value.indexOf('@') > 0)
        return true;
    else
        alert('Your email address is not valid');

    return false;
}

function popupForm(form, windowname)
{
    if(!window.focus)
        return true;

    window.open('', windowname, 'height=400,width=580,scrollbars=yes');
    form.target = windowname;

    return true;
}