I am trying to make a field in a php form required. I am using Dreamweaver Cs3.
Dreamweaver generated the following function
<script type="text/javascript">
<!--
function MM_validateForm() { //v4.0
if (document.getElementById) {
var i, p, q, nm, test, num, min, max, errors = '',
args = MM_validateForm.arguments;
for (i = 0; i < (args.length - 2); i += 3) {
test = args[i + 2];
val = document.getElementById(args[i]);
if (val) {
nm = val.name;
if ((val = val.value) != "") {
if (test.indexOf('isEmail') != -1) {
p = val.indexOf('@');
if (p < 1 || p == (val.length - 1)) errors += '- ' + nm + ' must contain an e-mail address.\n';
} else if (test != 'R') {
num = parseFloat(val);
if (isNaN(val)) errors += '- ' + nm + ' must contain a number.\n';
if (test.indexOf('inRange') != -1) {
p = test.indexOf(':');
min = test.substring(8, p);
max = test.substring(p + 1);
if (num < min || max < num) errors += '- ' + nm + ' must contain a number between ' + min + ' and ' + max + '.\n';
}
}
} else if (test.charAt(0) == 'R') errors += '- ' + nm + ' is required.\n';
}
}
if (errors) alert('The following error(s) occurred:\n' + errors);
document.MM_returnValue = (errors == '');
}
}
//-->
</script>
and called it in the
<form action="registered.php" method="post" name="frmRegister" onsubmit="MM_validateForm('addr1','','R');return document.MM_returnValue" >
When I run it on a chrome browser, I get an error saying alert is undefined.
I tried checking other answers but I am unable to get the code working. Could someone please help?
Other answers:
Injecting JS functions into the page from a Greasemonkey script on Chrome
