how-to scroll a page after page load based on element id

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<pre class="csharpcode">
        <span class="rem">/* START --- scroll till anchor */</span>
            (function($) {
                 $.fn.goTo = function() {
                      <span class="kwrd">var</span> top_menu_height=$(<span class="str">'#div_menu_header'</span>).height() + 5 ;
                      <span class="rem">//alert ( 'top_menu_height is:' + top_menu_height );</span>
                      $(<span class="str">'html, body'</span>).animate({
                            scrollTop: (-1)*top_menu_height + $(<span class="kwrd">this</span>).offset().top + <span class="str">'px'</span>
                      }, 500);
                      <span class="kwrd">return</span> <span class="kwrd">this</span>; <span class="rem">// for chaining...</span>
                 }
            })(jQuery);

            $(document).ready(function(){

              <span class="kwrd">var</span> url = document.URL, idx = url.indexOf(<span class="str">"#"</span>) ;
              <span class="kwrd">var</span> hash = idx != -1 ? url.substring(idx+1) : <span class="str">""</span>;

              $(window).load(function(){
                 <span class="rem">// Remove the # from the hash, as different browsers may or may not include it</span>
                 <span class="kwrd">var</span> anchor_to_scroll_to = location.hash.replace(<span class="str">'#'</span>,<span class="str">''</span>);
                 <span class="kwrd">if</span> ( anchor_to_scroll_to != <span class="str">''</span> ) {
                     anchor_to_scroll_to = <span class="str">'#'</span> + anchor_to_scroll_to ;
                     $(anchor_to_scroll_to).goTo();
                 }
                });
            });
        <span class="rem">/* STOP --- scroll till anchror */</span></pre>