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JQuery - Fixed Element during Scroll

I want to keep the position of an element likes a component on right side when I scroll down because of a very long content. Please take look at the code by visit the following link:

http://jsfiddle.net/p3unbmdy/

Javascript function:
$("#container").bind('scroll', function() {
    var fromTop = 50;
    var scrollVal = $("#container").scrollTop();
    var top = 0;
    if ( scrollVal > fromTop) {
        top = scrollVal - fromTop;
        $('#rightElement').css({'position':'absolute','right':'1em','top' :top+'px'});
    } else {
        $('#rightElement').css({'position':'static','top':'0px'});
    }
});
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