jQuery.fn.extend({
    highlight: function(search, configs){
        if(typeof(search) == 'undefined') return;
        var configs =  jQuery.extend({
            insensitive: 1, //是否匹配大小寫  0匹配 1不匹配
            hls_class: 'highlight', // 高亮后的class
            clear_last: true, // 清除原來高亮的結果
        },configs);   
        if(configs.clear_last) {
            $(this).find("strong."+configs.hls_class).each(function(){ 
                $(this).after($(this).text());
                $(this).remove(); 
            })
        }
        return this.each(function() {
            if(typeof(search) == "string") {
                $(this).highregx(search,configs);
            } else if (search.constructor === Array ) {
                for(var query in search){ 
                    var search_str = $.trim(search[query]);
                    if(search_str != "") $(this).highregx(search_str,configs);
                }
            } 
        });               
    },              
    highregx: function(query,configs){ 
        query = this.unicode(query);
        var regex = new RegExp("(<[^>]*>)|("+ query +")", configs.insensitive ? "ig" : "g");       
        this.html(this.html().replace(regex, function(a, b, c){
            return (a.charAt(0) == "<") ? a : "<strong class=/""+ configs.hls_class +"/">" + c + "</strong>";
        }));
    },
    unicode: function(s){ 
         var len=s.length; 
         var rs=""; 
         s = s.replace(/([-.*+?^${}()|[/]////])/g,"//$1");
         for(var i=0;i<len;i++){
            if(s.charCodeAt(i) > 255)
                rs+="//u"+ s.charCodeAt(i).toString(16);
            else rs +=  s.charAt(i);
         }   
         return rs; 
    }  
});