function checkMail(str) {
    var filter=/^([a-zA-Z0-9_\.\-])+@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    return filter.test(str);
}

function can_book() {
	/*
	if (document.frmbook.name.value == '') {
        alert('Please insert name!');
        document.frmbook.name.focus();
        return false;
    } else if ((document.frmbook.tel2.value == '')&&(document.frmbook.mobile.value == '')) {
        alert('Please insert phone or mobile number!');
        document.frmbook.tel2.focus();
        return false;
    } else if (!checkMail(document.frmbook.email.value)) {
        alert('Please insert valid e-mail address!');
        document.frmbook.email.focus();
        return false;
    } else if (document.frmbook.service.value == '') {
        alert('Please select type of service!');
        document.frmbook.service.focus();
        return false;
}
else if (document.frmbook.service.value == '') {
        alert('Please select type of service!');
        document.frmbook.service.focus();
        return false;
    } else {
        return true;
    }
    */
	var name_field=document.getElementById('name');
	var phone_field=document.getElementById('phone');
	var email_field=document.getElementById('email');
	var code_field=document.getElementById('c_security_code');
	
	var error=false;

	if (name_field.value=='') {
		name_field.style.border='solid 1px red';
		error=true;
	} else {
		name_field.style.border='solid 1px #E4E4E4';
	}
	if (phone_field.value=='') {
		phone_field.style.border='solid 1px red';
		error=true;
	} else {
		phone_field.style.border='solid 1px #E4E4E4';
	}
	if (!checkMail(email_field.value)) {
		email_field.style.border='solid 1px red';
		error=true;
	} else {
		email_field.style.border='solid 1px #E4E4E4';
	}
	if (code_field.value==''||code_field.value=='Enter security code') {
		code_field.style.border='solid 1px red';
		error=true;
	} else {
		code_field.style.border='solid 1px #E4E4E4';
	}
	
	if (error) { alert('Please check fields marked in red!'); }
	return !error;
}

function hide_popup(){
	$("#popup").css({'display':'none'});
	$(".opac").css({'display':'none'});
}
function show_popup(){
	$("#popup").css({'display':'block'});
	$(".opac").css({'display':'block'});
}