function validateForm() {

	var valid = true;
	
	//Name
	if(document.getElementById('tx_t3ffeedback_name').value == '') {
		document.getElementById('tx_t3ffeedback_name').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfieldError.gif')";
		valid = false;
	}
	else {
		document.getElementById('tx_t3ffeedback_name').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfield.gif')";
	}
	
	
	//Email
	if(!is_valid_email(document.getElementById('tx_t3ffeedback_email').value)) {
		document.getElementById('tx_t3ffeedback_email').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfieldError.gif')";
		valid = false;
	}
	else {
		document.getElementById('tx_t3ffeedback_email').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfield.gif')";
	}
	
	
	//Subject
	if(document.getElementById('tx_t3ffeedback_subject').value == '') {
		document.getElementById('tx_t3ffeedback_subject').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfieldError.gif')";
		valid = false;
	}
	else {
		document.getElementById('tx_t3ffeedback_subject').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktTextfield.gif')";
	}
	
	
	//Message
	if(document.getElementById('tx_t3ffeedback_message').value == '') {
		document.getElementById('tx_t3ffeedback_message').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktBigTextareaError.gif')";
		valid = false;
	}
	else {
		document.getElementById('tx_t3ffeedback_message').style.backgroundImage = "url('fileadmin/content/images/kontakt/kontaktBigTextarea.gif')";
	}
	
	
	
	if(!valid) {
		document.getElementById('tx_t3ffeedback_error').innerHTML = "Bitte alles korrekt Ausfüllen";
	}
	else {
		document.getElementById('tx_t3ffeedback_error').innerHTML = "";
		document.getElementById('tx_t3ffeedback_form').submit();
	}
	
}



function is_valid_email (email) {
	return (/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test(email));
}



function setButton(button) {

	document.getElementById('tx_t3ffeedback_submit').src = "fileadmin/content/images/kontakt/" + button;
}