$(document).ready(init);

function init(){
	$('#area').keyup(changeButton);
	$('#prefix').keyup(changeButton);
	$('#suffix').keyup(changeButton);
	$('#agree').click(changeButton);

	changeButton();
}

function changeButton(){
	if(shouldEnableButton()){
		$('#send').attr('src','images/sendActive.gif');
	}
	else{
		$('#send').attr('src','images/send.gif');
	}
}

function shouldEnableButton(){
	//check if all values are entered and checkbox is checked or not
	if($('#area').val().length == 3 && $('#prefix').val().length == 3 && $('#suffix').val().length == 4 && $('#agree').attr('checked')){
		return true;
	}
	else{
		return false;
	}
}

function submitForm(){
	if(shouldEnableButton()){
		document.widget_form.submit();
	}
}