<script type="text/javascript">
//<![CDATA[
    //--------begin function fHl(o, flag, rndColor, url)------------------//
    function fHl(o, flag, rndColor, url){
        /// <summary>
        ///     使用 javascript HTML DOM 高亮顯示頁面特定字詞.
        ///     實(shí)例:
        ///         fHl(document.body, '紙傘|她');
        ///         這里的body是指高亮body里面的內(nèi)容。
        ///         fHl(document.body, '希望|愁怨', false, '/');
        ///         fHl(document.getElementById('at_main'), '獨(dú)自|飄過|悠長', true, 'search.asp?keyword=');
        ///         這里的'at_main'是指高亮id='at_main'的div里面的內(nèi)容。search.asp?keyword=指給關(guān)鍵字加的鏈接地址，
        ///         我這里加了一個(gè)參數(shù)，在后面要用到。可以是任意的地址。       
        /// </summary>
        /// <param name="o" type="Object">
        ///     對(duì)象, 要進(jìn)行高亮顯示的對(duì)象.
        /// </param>
        /// <param name="flag" type="String">
        ///     字符串, 要進(jìn)行高亮的詞或多個(gè)詞, 使用 豎杠(|) 分隔多個(gè)詞 .
        /// </param>
        /// <param name="rndColor" type="Boolean">
        ///     布爾值, 是否隨機(jī)顯示文字背景色與文字顏色, true 表示隨機(jī)顯示.
        /// </param>
        /// <param name="url" type="String">
        ///     URI, 是否對(duì)高亮的詞添加鏈接.
        /// </param>                       
        /// <return></return>
        var bgCor=fgCor='';
        if(rndColor){
            bgCor=fRndCor(10, 20);
            fgCor=fRndCor(230, 255);
        } else {
            bgCor='#F0F';
            fgCor='black';
        }
        var re=new RegExp(flag, 'i');
        for(var i=0; i<o.childNodes.length; i++){    
            var o_=o.childNodes[i];
            var o_p=o_.parentNode;
            if(o_.nodeType==1) {
                fHl(o_, flag, rndColor, url);                
             } else if (o_.nodeType==3) {
                if(!(o_p.nodeName=='A')){
                    if(o_.data.search(re)==-1)continue;
                    var temp=fEleA(o_.data, flag);
                    o_p.replaceChild(temp, o_);
                }
            }
        }
        //------------------------------------------------
        function fEleA(text, flag){
            var style=' style="background-color:'+bgCor+';color:'+fgCor+';" '
            var o=document.createElement('span');
            var str='';
            var re=new RegExp('('+flag+')', 'gi');
            if(url){
                str=text.replace(re, '<a href="'+url+
                '$1"'+style+'>$1</a>'); //這里是給關(guān)鍵字加鏈接，紅色的$1是指上面鏈接地址后的具體參數(shù)。
            } else {
                str=text.replace(re, '<span '+style+'>$1</span>'); //不加鏈接時(shí)顯示
            }
            o.innerHTML=str;
            return o;
        }
        //------------------------------------------------
        function fRndCor(under, over){
            if(arguments.length==1){
                var over=under;
                    under=0;
            }else if(arguments.length==0){
                var under=0;
                var over=255;
            }
            var r=fRandomBy(under, over).toString(16);
                r=padNum(r, r, 2);
            var g=fRandomBy(under, over).toString(16);
                g=padNum(g, g, 2);
            var b=fRandomBy(under, over).toString(16);
                b=padNum(b, b, 2);
                //defaultStatus=r+' '+g+' '+b
            return '#'+r+g+b;
            function fRandomBy(under, over){
                switch(arguments.length){
                    case 1: return parseInt(Math.random()*under+1);
                    case 2: return parseInt(Math.random()*(over-under+1) + under);
                    default: return 0;
                }
            }
            function padNum(str, num, len){
                var temp=''
                for(var i=0; i<len;temp+=num, i++);
                return temp=(temp+=str).substr(temp.length-len);
            }
        }
    }
    //--------end function fHl(o, flag, rndColor, url)--------------------//
//]]>
</script>

<script type="text/javascript">
fHl(document.body, '高亮');   //對(duì)頁面body的區(qū)域中的“高亮”文字背景著色
</script>