var browser_width = 630, browser_height = 460;

function determine_browser_size()
{
    if (document.body && document.body.offsetWidth) {
     browser_width = document.body.offsetWidth;
     browser_height = document.body.offsetHeight;
    }
    if (document.compatMode=='CSS1Compat' &&
        document.documentElement &&
        document.documentElement.offsetWidth ) {
     browser_width = document.documentElement.offsetWidth;
     browser_height = document.documentElement.offsetHeight;
    }
    if (window.innerWidth && window.innerHeight) {
     browser_width = window.innerWidth;
     browser_height = window.innerHeight;
    }
}

function center_width(width)
{
    return Math.ceil((browser_width - width)/2)
}

function center_height(height)
{
    return Math.ceil((browser_height - height)/2)
}

function toggleEmailFieldHint() {
	if(jQuery('#email') && jQuery('#email-label')) {
		if (jQuery('#email').attr('value')=="" || !jQuery('#email').attr('value')) {
			jQuery('#email-label').addClass('show');
		} else {
			jQuery('#email-label').removeClass('show');
		}
	}
}

function addEmailFieldCheck() {
	if(jQuery('#email')) {
		jQuery('#email').blur(toggleEmailFieldHint);
		jQuery('#email').focus(function() {
			jQuery('#email-label').removeClass('show')
		});
	}
}

function addSubmitOnActive() {
	jQuery('input[type=submit]').mousedown(function() {
		jQuery(this).addClass('active');
	});
	jQuery('input[type=submit]').mouseup(function() {
		jQuery(this).removeClass('active');
	});
}

if (jQuery && document.getElementById) {
	jQuery(document).ready( function() {

//		addEmailFieldCheck();
//		toggleEmailFieldHint();
//		addSubmitOnActive();

        determine_browser_size();
        jQuery('#facebox').css('left', center_width(720).toString() + 'px');
        jQuery('#facebox').css('top',center_height(480).toString() + 'px');
	});


}