js实现checkbox批量增加和删除

//判断checkbox是否选择
function checkSelect(obj,name)
{
var count = 0;
//var checkId = new Array;
var form = document.getElementsByTagName("input");
for(var i=0; i<form.length; i++)
{
if (form[i].type=="checkbox"&&form[i].checked&&form[i].name == name )
{
++count;
}
}

if(count==0){
alert("请选择要处理服装！");
}
else{
if(obj.value == "上架"){
if(confirm("确定要上架这"+count+"件服装吗？")){
with(document.getElementById("form11")){
method="post";
action="clothingStock_saleClothing.action";
submit();
}
}
}
if(obj.value == "删除"){
if(confirm("确定要删除这"+count+"件服装吗？")){
with(document.getElementById("form11")){
method="post";
action="clothingStock_deleteClothing.action";
submit();
}
}
}
}
}