pb = function(el) {
    if (el.value == '') {
        el.value = 'Vaše Ime i Prezime';
    }
}
pf = function(el) {
    if (el.value == 'Vaše Ime i Prezime') {
        el.value = '';
    }
}
pb1 = function(el) {
    if (el.value == '') {
        el.value = 'Vaša e-mail adresa';
    }
}
pf1 = function(el) {
    if (el.value == 'Vaša e-mail adresa') {
        el.value = '';
    }
}

contactNameBlur = function(el) {
    if (el.value == '') {
        el.value = 'Your name';
    }
}
contactNameFocus = function(el) {
    if (el.value == 'Your name') {
        el.value = '';
    }
}
contactEmailBlur = function(el) {
    validateEmail();
    if (el.value == '') {
        el.value = 'Your email';
    }

}
contactEmailFocus = function(el) {
    $('submit-contact').disabled = false;
    if (el.value == 'Your email') {
        el.value = '';
    }
}
contactCompanyBlur = function(el) {
    if (el.value == '') {
        el.value = 'Your company';
    }
}
contactCompanyFocus = function(el) {
    if (el.value == 'Your company') {
        el.value = '';
    }
}
contactMessageBlur = function(el) {
    if (el.value == '') {
        el.value = 'Your message';
    }
}
contactMessageFocus = function(el) {
    if (el.value == 'Your message') {
        el.value = '';
    }
}

validateEmail = function() {
    var email = $('email-contact').value;
    var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (filter.test(email)) {
        $('submit-contact').disabled = false;
        $('mailError').innerHTML = '';
        return true;

    } else {
        $('submit-contact').disabled = true;
        $('mailError').innerHTML = 'Please enter valid email';
        return false;

    }
}

contactSubmit = function() {

    if (validateEmail()) {
        $('contactForm').submit();
    }
}