dom - Implementing a simple floating navigation in Javascript -

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I am trying to implement a simple floating navigation using DOM and Javascript. The following script is triggered using the oncroll event, but nothing happens through firebug and debugging is not completely enlightened. 

  function float_nav () {nav = document.getElementById ("nav_container"); Offset = window Pagewise offset + 'px;'; Nav.style.top = offset; }

You do not have to add; At the end of px otherwise I do not see anything wrong.

Extra: Why do not you use jQuery or something similar?


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