js选中checkbox的代码

<script type="text/javascript">
function getSelectedUsers() {
   var sltUser = "";
   var arrSelect = document.getElementsByName("myCheckBox");
   for (i = 0; i < arrSelect.length; i++) {
       if (arrSelect[i].checked) {
           sltUser += arrSelect[i].value + ",";
           i[0]+=1;
    }
}
if (sltUser == "") {
    alert("请至少选择一个会员信息！");
    return false;
}
else {
  
    document.getElementById("txtSelectedCustomers").value = sltUser;
   return confirm('确定要删除？');
}
    }
</script>
<input id="myCheckBox" name="myCheckBox" type="checkbox" value="<%#Eval("ID") %>" style=" width:100px;height:50px;" />
protected void delete_Click(object sender, EventArgs e)
{
//string strCheck = this.txtSelectedCustomers.Value;//获取选中值
string[] strCheck = Request.Form["myCheckBox"].ToString().TrimEnd(',').Split(',');//获取选中值

for (int i = 0; i < strCheck.Length; i++)
{
  int id = Convert.ToInt32(strCheck[i]);
  系统用户表DAInstance().删除用户hzc(id);
}}

<input type="checkbox" name="Checkbox1222" onclick="javascript:selectAll(this.form,this.checked)" />全选。
<script  type="text/javascript">
    function selectAll(f, mode) {
if (mode == true) {
    for (i = 0; i < f.length; i++) {
if (f.elements[i].type == "checkbox") {
    f.elements[i].checked = true;
}
    }
}
else {
    for (i = 0; i < f.length; i++) {
if (f.elements[i].type == "checkbox") {
    f.elements[i].checked = false;
}
    }
}
    }
</script>