checkbox 判断是否选择

 1function deleteAllSome()
 2    {
 3        var inputs=document.all.tags("input");
 4        
 5        var Leng=0;
 6        
 7        for(var i=0; i<inputs.length; i++)
 8        {
 9            if(inputs[i].type=="checkbox")
10            {
11                if(inputs[i].checked)
12                {
13                    if(inputs[i].id!="checkAll")
14                    {
15                        Leng++;
16                    }
17                }
18            }
19        }
20        if(Leng==0)
21        {
22            alert("请选择你要彻底删除的数据!");
23            
24            return false;
25        }
26        else
27        {
28            var Flag=confirm("你确实要彻底删除你所选择的景点吗?该操作是不可恢复的!");
29            if(!Flag)
30            {
31                return false;
32            }
33            else
34            {
35                return true;
36            }
37        }
38    }