<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
function addComma(from) {
	var to = String(from);
	var tmp = "";
	while (to != (tmp = to.replace(/^([+-]?\d+)(\d\d\d)/,"$1,$2"))){
		to = tmp;
	}
	return to;
}
function cleanupAmount(field) {
	var valid = "0123456789.";
	var temp = "";
	var output = "";
	for (var i = 0; i < field.length; i++) {
		temp = "" + field.substring(i, i+1);
		if (valid.indexOf(temp) != -1) {
			output += temp;
		}
	}
	return output;
}
function adCalc(form) {
	if (activeMetric == 'cpc') {
		form.cpa.value = "";
		var ok = 0;
		var cpc = cleanupAmount(form.cpc.value); 
		var cpa = cleanupAmount(form.cpa.value);
		var conversionrate = cleanupAmount(form.conversionrate.value) / 100;
		var incomplete = "数値の入力が不十分です。";
		if (cpc != "" && cpa != "" && conversionrate != "") {
			msg = "数値を求める箇所だけ空欄にしてください。";
			alert(msg);
		}
		else {
			if (cpc != "" && cpa != "")					{ form.conversionrate.value = cpc / cpa; ok++; }
			else if (cpc != "" && conversionrate != "")			{ form.cpa.value = addComma(cpc / conversionrate); ok++; }
			else if (conversionrate != "" && cpa != "")			{ form.cpc.value = cpa * conversionrate; ok++; }
			else alert("「CPC」「コンバージョン率」の両方に数値を入力してください。");
		}
	}
	else if (activeMetric == 'cpm') {
		form.cpa.value = "";
		var ok = 0;
		var cpm = cleanupAmount(form.cpm.value) / 1000; 
		var cpa = cleanupAmount(form.cpa.value);
		var ctr = cleanupAmount(form.ctr.value);
		var conversionrate = cleanupAmount(form.conversionrate.value) / 10000;
		var incomplete = "数値の入力が不十分です。";
		if (cpm != "" && cpa != "" && ctr != "" && conversionrate != "") {
			msg = "数値を求める箇所だけ空欄にしてください。";
			alert(msg);
		}
		else {	
			if (cpm != "" && cpa != "" && ctr != "")			{ form.conversionrate.value = cpm / (cpa * ctr); ok++; }
			else if (cpm != "" && ctr != "" && conversionrate != "")	{ form.cpa.value = addComma(cpm / (ctr * conversionrate)); ok++; }
			else if (conversionrate != "" && cpa != "" && ctr != "")	{ form.cpm.value = cpa * ctr * conversionrate * 1000; ok++; }
			else if (cpm != "" && conversionrate != "" && cpa != "")	{ form.ctr.value = cpm / (conversionrate * cpa); ok++; }
			else alert("「CPM」「CTR」「コンバージョン率」のすべてに数値を入力してください。");
		}
	}
}
var activeMetric = 'cpm';
function switchActiveMetric() {
	if (activeMetric == 'cpm') {
		activeMetric = 'cpc';
		document.getElementById('cpmMetric').style.display = 'none';
		document.getElementById('cpcMetric').style.display = '';
		document.getElementById('ctrSection').style.display = 'none';
		document.getElementById('cpmTabOn').style.display = 'none';
		document.getElementById('cpcTabOn').style.display = '';
	}
	else {
		activeMetric = 'cpm';
		document.getElementById('cpmMetric').style.display = '';
		document.getElementById('cpcMetric').style.display = 'none';
		document.getElementById('ctrSection').style.display = '';
		document.getElementById('cpmTabOn').style.display = '';
		document.getElementById('cpcTabOn').style.display = 'none';
	}
}
function submitTheForm(e,f) {
	if (e.keyCode == 13)
		adCalc(f);
}
function clearFormAll() {
	for (var i=0; i<document.forms.length; ++i) {
		clearForm(document.forms[i]);
	}
}
function clearForm(form) {
	for(var i=0; i<form.elements.length; ++i) {
		clearElement(form.elements[i]);
	}
}
function clearElement(element) {
	switch(element.type) {
		case "hidden":
		case "submit":
		case "reset":
		case "button":
		case "image":
			return;
		case "file":
			return;
		case "text":
		case "password":
		case "textarea":
			element.value = "";
			return;
		case "checkbox":
		case "radio":
			element.checked = false;
			return;
		case "select-one":
		case "select-multiple":
			element.selectedIndex = 0;
			return;
		default:
	}
}