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  • JS实现全选,全不选

     <script type="text/javascript">
            function selectItem() {
                document.getElementById("chklist").value = "";
                var chblist = document.getElementsByName("chkItem");
                if (chblist.length > 0) {
                    var rtn = "";
                    for (var i = 0; i < chblist.length; i++) {
                        if (chblist[i].checked) {
                            rtn += chblist[i].value + ",";
                        }
                        else {
                            continue;
                        }
                    }
                    document.getElementById("chklist").value = rtn.substring(0, rtn.length - 1);
                    if (document.getElementById("chklist").value == "") {
                        document.getElementById("chkAll").checked = false;
                    }
                }
                else {
                    alert("您还没有选择!");
                    return;
                }
            }
            function selectall() {
                document.getElementById("chklist").value = "";
                var items = document.getElementsByName("chkItem");
                var rtn = "";
                var itemAll = document.getElementById("chkAll");
                for (var i = 0; i < items.length; i++) {
                    items[i].checked = itemAll.checked;
                    if (items[i].checked) {
                        rtn += items[i].value + ",";
                    }
                    else {
                        continue;
                    }
                }
                document.getElementById("chklist").value = rtn.substring(0, rtn.length - 1);
            }
      </script>
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  • 原文地址:https://www.cnblogs.com/stevenjson/p/3139746.html
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