function format_title(title, currentArray, currentIndex, currentOpts) {
    return '<div style="text-align:left;">' + (title && title.length ? '' + title + '' : '' ) + '</div><div style="text-align:right; padding-top:4px; font-weight:bold;">Video ' + (currentIndex + 1) + ' of ' + currentArray.length + '</div>';
}

function highlight(item, is_true) {
	item.className = (is_true) ? "elementError" : "element";
}

function is_email(str) {
	/*var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;*/
	var regex = /^[a-z0-9\._-]+@([a-z0-9_-]+\.)+[a-z]{2,6}$/i;
	return regex.test(str);
}