how should i call a javascript function into a kohana view?

i am having a simple kohana view, and a javascript that makes a countdown of 30 minutes. I hava put the javascript file into a directory /media m and its name is countdown.js . My problem is: how can i call that javascript? Form the view? Or from the controller to be displayed in the view? and how exactly may i address in a controller or a view that js function or functions?

thank you

the countdown js:

var javascript_countdown = function () { var time_left = 10; //number of seconds for countdown var output_element_id = 'javascript_countdown_time'; var keep_counting = 1; var no_time_left_message = 'No time left for JavaScript countdown!';

function countdown() {
    if(time_left < 2) {
 开发者_运维技巧       keep_counting = 0;
    }

    time_left = time_left - 1;
}

function add_leading_zero(n) {
    if(n.toString().length < 2) {
        return '0' + n;
    } else {
        return n;
    }
}

function format_output() {
    var hours, minutes, seconds;
    seconds = time_left % 60;
    minutes = Math.floor(time_left / 60) % 60;
    hours = Math.floor(time_left / 3600);

    seconds = add_leading_zero( seconds );
    minutes = add_leading_zero( minutes );
    hours = add_leading_zero( hours );

    return hours + ':' + minutes + ':' + seconds;
}

function show_time_left() {
    document.getElementById(output_element_id).innerHTML = format_output();//time_left;
}

function no_time_left() {
    document.getElementById(output_element_id).innerHTML = no_time_left_message;
}

return {
    count: function () {
        countdown();
        show_time_left();
    },
    timer: function () {
        javascript_countdown.count();

        if(keep_counting) {
            setTimeout("javascript_countdown.timer();", 1000);
        } else {
            no_time_left();
        }
    },
    init: function (t, element_id) {
        time_left = t;
        output_element_id = element_id;
        javascript_countdown.timer();
    }
};

}();

//time to countdown in seconds, and element ID javascript_countdown.init(3673, 'javascript_countdown_time');

You can use kohana html helpers. In your controller function or your view file, you can have it like this :

echo html::script('media/countdown.js');

Place the echo statement after the html element with id "javascript_countdown_time". Before the closing </body> if possible.

...
<div id="javascript_countdown_time"></div>
...
<script src="/media/countdown.js"></script>
</body>

You could do what @erickb said, or you could do this in your
view (php)

<script src="media/countdown.js"></script>

make sure that countdown.js is loaded when the page is displayed in your browser [ use firebug or developer panel in chrome to verify it was loaded. ]

Wherever you wanted to call the functions from , just call it.. Let us know how it went..