$(document).ready(init);

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

	changeButton();
}


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();
	}
}

function checkNum(num){
	var w 	= "";
	var v	= "0123456789";
	for (i=0; i < num.value.length; i++) {
		x = num.value.charAt(i);
		if (v.indexOf(x,0) != -1)
			w += x;
	}
	num.value = w;
}

function advance(num,len,elem,key)
{
	switch(key)
	{
		case 8:return; break;
		case 9:return; break;
		case 16:return; break;
		case 32:return; break;
		case 46:return; break;
	}
	if ( num.value.length==len)
	{
		document.forms['widget_form'].elements[elem].focus();
	}
}

function key(e) {return e?e.which:event.keyCode;}