function PayMethodChange(elem) {
	var elem = document.getElementById('payed_how');
	var disabled_elem   = document.getElementById('account_nr');

	disabled_elem.disabled = (elem.value == 3) ? false : true;
	
	
	if (elem.value == 3){
		document.getElementById("account_nr").style.background = '#fff';
		document.getElementById("account_nr").style.border = '1px solid #444';
	} else {
		document.getElementById("account_nr").style.background = '#f6f6f6';
		document.getElementById("account_nr").style.border = '1px solid #d9d9d9';
	}
	
}

function new_captcha() {
	var c_currentTime = new Date();
	var c_miliseconds = c_currentTime.getTime();

	document.getElementById('captcha').src = 'image.php?x='+ c_miliseconds;
}


function validate(field_name, field_value) {
	switch (field_name)
	{
		// NAME
		case "name": 

		var name_enter = "<?php echo $errors['name_enter']; ?>";

		if (field_value == null || field_value == "") {
			document.getElementById("name_status").innerHTML = '<div class="field_error">'+ name_enter +'</div>';
		}
		else {
			document.getElementById("name_status").innerHTML = '';
		}
		break;
		
		// E-MAIL
		case "email":
		
		var email_enter = "<?php echo $errors['email_enter']; ?>";	
		var email_not_valid = "<?php echo $errors['email_not_valid']; ?>";
		
		if (field_value == null || field_value == "") {
			document.getElementById("email_status").innerHTML = '<div class="field_error">'+ email_enter +'</div>';
		}
		else {
			if(!regIsEmail(field_value)) {
				document.getElementById("email_status").innerHTML = '<div class="field_error">'+ email_not_valid +'</div>';
			}
			else {
				document.getElementById("email_status").innerHTML = '';
			}
		}
		break;


		// SUBJECT
		case "subject":

		var subject_enter = "<?php echo $errors['subject_enter']; ?>";

		if (field_value == null || field_value == "") {
			document.getElementById("subject_status").innerHTML = '<div class="field_error">'+ subject_enter +'</div>';
		}
		else {	
			document.getElementById("subject_status").innerHTML = '';
		}
		break;

		// MESSAGE
		case "message":

		var message_enter = "<?php echo $errors['message_enter']; ?>";

		if (field_value == null || field_value == "") {
			document.getElementById("message_status").innerHTML = '<div class="field_error">'+ message_enter +'</div>';
		}
		else {
			document.getElementById("message_status").innerHTML = '';
		}
		break;
	}

	return true;
}

function regIsEmail(field_value)
{
	var reg = new RegExp("^[0-9a-zA-Z]+@[0-9a-zA-Z]+[\.]{1}[0-9a-zA-Z]+[\.]?[0-9a-zA-Z]+$");
	return reg.test(field_value);
}