'alert'在chrome中未定义

Question

我正在尝试以php形式创建一个字段。我正在使用Dreamweaver Cs3。

Dreamweaver生成了以下功能

 <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>

并在

中调用它

<form action="registered.php" method="post" name="frmRegister" onsubmit="MM_validateForm('addr1','','R');return document.MM_returnValue" >

当我在Chrome浏览器上运行它时，我收到错误消息，指出警报未定义。

我尝试检查其他答案，但我无法让代码正常工作。有人可以帮忙吗？

其他答案：

Injecting JS functions into the page from a Greasemonkey script on Chrome

jquery alert says undefined