How to implement HTML background navigation iframe Click-to-change URL (code)

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Wrote a small project, the Internet casually find a background template, and do not want to repeatedly load head,footer ...

Think of using IFRAME, casually write, welcome everyone to advise

Id= "Nav_menu" added to the two-level menu of UL ....

<script type= "Text/javascript" >//Navigation $ (' #nav_menu a '). Click (Function (        {//Check style $ (". Am-fr"). Removeclass (' Am-icon-star ');        $ (this). Children ('. Am-fr '). addclass (' Am-icon-star ');        URL href = $ (this). attr (' href ');        $ (' #iframe '). attr (' src ', href);    return false;    });    Whether the IFrame is loaded and hides the scrollbar var iframe = document.getElementById ("iframe");      if (iframe.attachevent) {iframe.attachevent ("onload", function () {hides ();    });      } else {iframe.onload = function () {hides ();    };      } function hides () {document.getElementById ("iframe"). scrolling= "No";    document.getElementById ("iframe"). style.overflow= "hidden"; }</script>