I just tried this test:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<script>
window.onload = function() {
var s = document.getElementById('field[12]');
var cust_cc_exp_month = s.options[s.selectedIndex].value;
// This displays the correct Value -- which is "0" for item #0 = "Please select..."
alert("Month: " + cust_cc_exp_month.toString());
if (cust_cc_exp_month == "0") {
// This code never executes!
alert('ok');
}
};
</script>
<select id="field[12]" name="field[12]">
<option value="0">MONTH</option>
<option value="1" <?php if ($field[12] == "1") echo "SELECTED" ?>>January</option>
<option value="2" <?php if ($field[12] == "2") echo "SELECTED" ?>>February</option>
<option value="3" <?php if ($field[12] == "3") echo "SELECTED" ?>>March</option>
</select>
</body>
</html>
After the window loads,
alert('ok'); is executed as expected. I tested in FF2.0 and IE6,7.
I don't see how you could be having the problem you're having unless you have a JavaScript error somewhere thats preventing full execution of the JS.
a conditional such as:
if (cust_cc_exp_month == "0")
is equivalent to:
if (cust_cc_exp_month == false)
or
since type's are not being evaluated.
If you had
if (cust_cc_exp_month === "0")
then the type would matter and an Integer 0 would be differentiated from the string '0' or the boolean false.
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