MVC3 Razor: call javascript function from view

I am new in MVC3 Razor and want to show running time on a view (index.cshtml). I use a javascript function and put it in _Layout.cshtml so all other "home" views can use it (see following snippet)

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>
        @ViewBag.Title
    </title>
    <link href="@Url.Content("~/Content/Site.css")" rel="stylesheet" type="text/css" />
    <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script>
    <script src="@Url.Content("~/Scripts/modernizr-1.7.min.js")" type="text/javascript"></script>
</head>
<script type="text/javascript">
    var uhr = new Date();
    var minuten;
    var stunden;
    var sekunden;
    var interval = 500;

    function datum(id) {
        uhr.setTime(uhr.getTime() + interval);
        window.setTimeout(function () { datum(id) }, interval);
        minuten = uhr.getMinutes();
        stunden = uhr.getHours();
        sekunden = uhr.getSeconds();
        if (minuten < 10) { minuten = '0' + minuten; }
        if (sekunden < 10) { sekunden = '0' + sekunden; }
        if (stunden < 10) { stunden = '0' + stunden; }
        document.getElementById(id).innerHTML = 'Jetzt ist: ' + stunden + ':' + minuten + ':' + sekunden;
    }
</script>

My questions: 1. how can I call this function (e.g. datum("uhr")) from index.cshtml? My try (see following) doesn't work:

@section SideBar {
    <p>
        <ul>
            <li><a href="Index.cshtml">Add Job</a></li>
            <li><a href="About.cshtml">About</a></li>
        </ul>
    </p>
    <p>
        The time is: datum("uhr");
    </p>
}

Any other "better" way?
Is it a good practice? I am not sure if it is correct putting javascript function in _Layout.cshtml.

Thx in advance.

回答1:

You should move the code from _Layout.cshtml into a seperate .js file and add a reference to it.

Also, you should change the index.cshtml code to be this:

@section SideBar {
<p>
    <ul>
        <li><a href="Index.cshtml">Add Job</a></li>
        <li><a href="About.cshtml">About</a></li>
    </ul>
</p>
<p>
    The time is: <span id="uhr"></span> 
</p>
<script type="text/javascript">datum("uhr");</script>
}

JS Fiddle Example

回答2:

The last line of the datum function should return the time rather than setting the innerHTML:

return 'Jetzt ist: ' + stunden + ':' + minuten + ':' + sekunden;

and your HTML can then be something like this:

The time is: <script type="text/javascript">datum(uhr)</script>