求教

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
<title>Login</title>
    <link type="text/css" rel="stylesheet" href="css/bootstrap.min.css">
    <link type="text/css" rel="stylesheet" href="css/homepage.css" />
    <script rel="script" src="js/hpgscript.js"></script>
    <script src="js/bootstrap.min.js" rel="script"></script>
    <script rel="script" src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
    <script rel="script" src="http://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
    <script rel="script" src="http://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<body>
    <div id="bk_color">
        <!--<embed class="bgm" src="高梨康治%20-%20仪礼.mp3"></embed>-->
        <p class="h1 myH1">
            Present situation and Countermeasures of information technology application in Universities<br>
            <small>This is a password protected page.</small>
        </p>
        <form id="pw_in" role="form" class="container" method="get">
            <div class="input_center">
                <label class="text-info" style="font-size: 18px">Password:</label>
                <div class="input-group">
                    <span class="input-group-addon"><span class="glyphicon glyphicon-lock"></span></span>
                    <input id="password" type="password" name="password" class="form-control input-lg" style="width: 400px" placeholder="Please enter the password...">
                </div><br>
                <input onclick="checkPWD()" class="btn btn-info btn-lg" type="submit" value="submit" />
                <button type="button" class="btn btn-link btn-info" data-toggle="tooltip" data-placement="right" title="pwd:123456">Forgot?</button>
            </div>
        </form>
        <img src="ul0832-1893.jpg" />
    </div>
</body>
</html>function checkPWD() {
    var pwd=123456;
    var inpwd=document.getElementById("password").value;
    if(pwd == inpwd){
        window.location.href="../catalog"
    }
    else {
        alert("Wrong password!");
    }
}
下面（贼鸡儿简单的）密码js方法是html文件中引用的自定义hpgscript.js中的，
问题就是，如果单独把表单跟这个方法放在一起就可以实现效果，但当像以上这样引用时就整死不能跳转页面...求解