//--------begin function fHl(o, flag, rndColor, url)------------------// 
    function fHl(o, flag, rndColor, url){ 
        var bgCor=fgCor=''; 
        if(rndColor){ 
            bgCor=fRndCor(10, 20); 
            fgCor=fRndCor(230, 255); 
        } else { 
            bgCor='yellow'; 
            fgCor='red'; 
        } 
        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="color:'+fgCor+';" ';
            var o=document.createElement('span'); 
            var str=''; 
            var re=new RegExp('('+flag+')', 'gi'); 
            if(url){ 
                str=text.replace(re, '<a href="'+url+ 
                '"'+style+'>$1</a>'); 
            } else { 
                str=text.replace(re, '<span '+style+'>$1</span>'); 
            } 
            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); 
            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)--------------------// 

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