Facebook风格搜索朋友

jQuery代码
$(document).ready(function(){
    $(".searchkeyword").keyup(function(){
        var str = $(".searchkeyword").val();
		var count = 0;
//loop through the friendslist
$(".friendslist .holder").each(function(index){
            if($(this).attr("id")){
				//case insenstive search
                if(!$(this).attr("id").match(new RegExp(str, "i"))){
                    $(this).fadeOut("fast");
                }else{
                    $(this).fadeIn("slow");
					count++;
                }
            }
        });
		//display no of results box when str is not empty
		if(str == '') { $("#result_area").hide(); } else { $("#result_area").show(); }
		//display no of results found
		$("#result_area").text("Top "+count+" results for "+str);
    });
});