JS多项选择删除

$(document).ready(function(){
 $("#batdel").click(function(){        
        var checkedLen = 0;
        var checkedVal = new Array();
        var boxes = $('#tb :checkbox');
         
        for(var i=0;i<boxes.length;i++){
            if(boxes[i].checked == true){
                checkedLen++;
                checkedVal.push(boxes[i].value);
            } 
        }
        if(checkedLen == 0){
            art.dialog.alert("请先选择记录!");
 
            return false;
        }         
       //art.dialog.alert(checkedVal.join(','));     //输出选中的id        
        art.dialog.confirm('您确认要删除该信息吗？',function(){
            $.get('news/del?id='+checkedVal.join(','),function(r){
                if(r=='ok'){
                    opSuccess('信息删除成功');
                }else{
                    art.dialog.alert(r);
                }
            });
        },function(){ return true})
        
    }); 
});