form to total check box AND list values
I am beginning to create a form to let customers get quotes depending on the options they select. I was doing fine getting the total to work until I added the check box. Why will it not work now?
PHP Code:
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Quote</title>
<script type="text/javascript">
function calc(){
frm = document.form1;
n1 = frm.select_1.options[frm.select_1.selectedIndex].value;
n2 = frm.select_2.options[frm.select_2.selectedIndex].value;
n3 = frm.envelope.options[frm.envelope.selectedIndex].value;
if (printed.checked) { n4 = (printed.value); }
res = parseFloat(n1) + parseFloat(n2) + parseFloat(n3) + parseFloat(n4);
frm.result.value = res;
}
</script>
</head>
<body>
<form name="form1" id="form1" method="post" action="">
<p>What style invitation do you want :
<select name="select_1">
<option selected="selected">INVITATION SELECTION</option>
<option value=".50">Standard invitation ($0.50 each)</option>
<option value="1.20">Metallic invitation ($1.20 each)</option>
<option value="1.50">Textured Metallic invitation ($1.50 each)</option>
<option value="2.00">Fabric invitation ($2.00 each)</option>
</select>
<br />
Do you want an envelope liner:
<select name="select_2">
<option selected="selected">LINER SELECTION</option>
<option value="1.00">Standard color liner ($1.00each )</option>
<option value="2.00">Metallic liner ($2.00 each)</option>
</select>
<br />
What type of Envelope
<select name="envelope" >
<option selected="selected">ENVELOPE SELECTION</option>
<option value=".42">envelope in E1 color ($0.42 each)</option>
<option value=".50">envelope in E2 color ($0.50 each)</option>
<option value=".60">envelope in E3 color ($0.60 each)</option>
</select>
<br />
Do you want the envelope printed
<input name="printed" type="checkbox" id="printed" value=".50" />
</p>
<p>
<input type="button" name="Button" value="Calculate" onclick="calc()" />
The total cost per invitation is
<input name="result" type="text" id="result" />
</p>
</form>
</body>
</html>
