怎样将js中innerHTML输出到页面中

<!--
  copyright (c) 2009 Google inc.  You are free to copy and use this sample.
  License can be found here: http://code.google.com/apis/ajaxsearch/faq/#license
--><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="content-type" content="text/html; charset=gb2312"/>
    <title>Google AJAX Search API Sample</title>
    <script src="http://www.google.com/jsapi?key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q"></script>
    <script type="text/javascript">
    /*
    *  The Hello World of the AJAX Search API
    */
    
    google.load('search', '1');
  
    function OnLoad() {
      // Create a search control
      var searchControl = new google.search.SearchControl();
    
      // Add in a full set of searchers
      var localSearch = new google.search.LocalSearch();
      searchControl.addSearcher(localSearch);
      searchControl.addSearcher(new google.search.WebSearch());
      searchControl.addSearcher(new google.search.VideoSearch());
      searchControl.addSearcher(new google.search.BlogSearch());
      searchControl.addSearcher(new google.search.NewsSearch());
      searchControl.addSearcher(new google.search.ImageSearch());
      searchControl.addSearcher(new google.search.BookSearch());
      searchControl.addSearcher(new google.search.PatentSearch());
    
      // Set the Local Search center point
      //localSearch.setCenterPoint("New York, NY");
    
      // tell the searcher to draw itself and tell it where to attach
     
     searchControl.draw(document.getElementById("content"));
      // execute an inital search
      searchControl.execute("北京租房");
  
 
    }
    
    google.setOnLoadCallback(OnLoad);
function content()
{
s1=document.getElementById("content").firstChild.outerHTML;

document.writeln(s1);

}    
    </script>
  </head>
  <body style="font-family: Arial;border: 0 none;" >
  <INPUT   TYPE= "button" value="提交"  onclick   = "content() "> 
    <div id="content">Loading...</div>

<div id="content2">





</div>
  </body>
 
</html>以上代码是google api调用，点击提交后，能将调用的内容输出到新的结果中， 现在我想要在程序加载完成后自动执行提交的动作，该如何操作，请高人指点！