js 页内搜寻(主要文章内容) _JavaScript

js 页内搜索(主要文章内容)

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<META name="Author" content="Sheneyan" />
<script type="text/javascript">
function encode(s){
  return s.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/([\\\.\*\[\]\(\)\$\^])/g,"\\$1");
}
function decode(s){
  return s.replace(/\\([\\\.\*\[\]\(\)\$\^])/g,"$1").replace(/>/g,">").replace(/</g,"<").replace(/&/g,"&");
}
function highlight(s){
  if (s.length==0){
    alert('搜索关键词未填写！');
    return false;
  }
  s=encode(s);
  var obj=document.getElementsByTagName("body")[0];
  var t=obj.innerHTML.replace(/<span\s+class=.?highlight.?>([^<>]*)<\/span>/gi,"$1");
  obj.innerHTML=t;
  var cnt=loopSearch(s,obj);
  t=obj.innerHTML
  var r=/{searchHL}(({(?!\/searchHL})|[^{])*){\/searchHL}/g
  t=t.replace(r,"<span class='highlight'>$1</span>");
  obj.innerHTML=t;
  alert("搜索到关键词"+cnt+"处")
}
function loopSearch(s,obj){
  var cnt=0;
  if (obj.nodeType==3){
    cnt=replace(s,obj);
    return cnt;
  }
  for (var i=0,c;c=obj.childNodes[i];i++){
    if (!c.className||c.className!="highlight")
      cnt+=loopSearch(s,c);
  }
  return cnt;
}
function replace(s,dest){
  var r=new RegExp(s,"g");
  var tm=null;
  var t=dest.nodeValue;
  var cnt=0;
  if (tm=t.match(r)){
    cnt=tm.length;
    t=t.replace(r,"{searchHL}"+decode(s)+"{/searchHL}")
    dest.nodeValue=t;
  }
  return cnt;
}
</script>
<style type="text/css">
.highlight{background:red;font-weight:bold;color:white;}
</style>
</head>
<body>
<form onsubmit="highlight(this.s.value);return false;">
<p><input name="s" id="s" title="搜索内容：" value="中华民国" /><input type="submit" value="搜索"/></p>
</form>
<div id="content">

<p>1911年十月十日，国父孙中山先生和革命党同志们经历了十次革命失败， 

</div>
</body>
</html>

以上是互联网版本的页面，

而我主要是针对文章内容（包括从word复制到编辑器，其中有相关样式及文字格式控制内容）的搜索；

使用上页的代码我经过测试，在ie中会出现{searchHL}，但本人对js RegExp不太精通，故做以下修改

   var i =0;
     function highlight(){ ......
           i=i+1;
          t=t.replace(r,"<span class='highlight2'>$1</span>");
         t=t.replace(r,"<span class='highlight2'>$1</span>");
       obj.innerHTML=t;
        if(i/2==1){
            highlight();
        }
      
    }