【100分】如何给asp:TreeView控件里的CheckBox的Value赋值，让前台JS可以取到

【100分】怎么给asp:TreeView控件里的CheckBox的Value赋值，让前台JS可以取到？
如题，页面里有个TreeView控件，其中给每个节点都进行了赋值
TreeNode tempnode = new TreeNode();
tempnode.ShowCheckBox = true;
tempnode.Text = IS.Cate_Name;
tempnode.Expanded = false;
tempnode.Value = IS.Cate_ID;

我在前台：
function checkvalue() {
{
var tree = document.getElementById("treeIS");
var inputs = tree.getElementsByTagName("INPUT");
for (var i = 0; i < inputs.length; i++) {
if (inputs[i].type == "checkbox" && inputs[i].checked) {
alert(inputs[i].text + " " + inputs[i].value);
}
}

}
}

但是在前台可以找到选中的CheckBox，但是没有给value赋值，只有：<input type="checkbox" name="treeISn1CheckBox" id="treeISn1CheckBox" />
因此我用JS就无法取到，谁有什么好办法？？？？

------解决方案--------------------

HTML code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TreeViewSample.aspx.cs"
    Inherits="WebApp.TreeViewSample" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>treeview父子节点联动</title>

    <script type="text/javascript">

        function OnTreeNodeChecked(evt) {
            var objNode = evt.srcElement ? evt.srcElement : evt.target;

            if (objNode.checked == true) {
                alert(getHideValue(objNode));
                setParentChecked(objNode);
                var objID = objNode.getAttribute("ID");
                var objID = objID.substring(0, objID.indexOf("CheckBox"));
                var objParentDiv = document.getElementById(objID + "Nodes");
                if (objParentDiv != null && objParentDiv != "undefined") {
                    setChildChecked(objParentDiv);
                }
            }
            else {
                var objID = objNode.getAttribute("ID");
                var objID = objID.substring(0, objID.indexOf("CheckBox"));
                var objParentDiv = document.getElementById(objID + "Nodes");
                if (objParentDiv != null && objParentDiv != "undefined") {
                    setChildUnChecked(objParentDiv);
                }
            }

            if (objNode.tagName && objNode.tagName != "INPUT") {
                if (objNode.tagName == "IMG") {
                    return true;
                }
                else {
                    if (window.event) {
                        window.event.returnValue = false;
                        return false;
                    }
                    else {
                        evt.preventDefault();
                        evt.stopPropagation();
                    }
                }
            }
        }

        function public_GetParentByTagName(element, tagName) {
            var parent = element.parentNode;
            var upperTagName = tagName.toUpperCase();

            while (parent && (parent.tagName.toUpperCase() != upperTagName)) {
                parent = parent.parentNode ? parent.parentNode : parent.parentElement;
            }
            return parent;
        }

        function setParentChecked(objNode) {
            var objParentDiv = public_GetParentByTagName(objNode, "div");
            if (objParentDiv == null || objParentDiv == "undefined") {
                return;
            }
            var objID = objParentDiv.getAttribute("ID");
            objID = objID.substring(0, objID.indexOf("Nodes"));
            objID = objID + "CheckBox";
            var objParentCheckBox = document.getElementById(objID);
            if (objParentCheckBox == null || objParentCheckBox == "undefined") {
                return;
            }
            if (objParentCheckBox.tagName != "INPUT" && objParentCheckBox.type == "checkbox")
                return;
            objParentCheckBox.checked = true;
            setParentChecked(objParentCheckBox);
        }

        function setChildUnChecked(divID) {
            var objchild = divID.children;
            var count = objchild.length;
            for (var i = 0; i < objchild.length; i++) {
                var tempObj = objchild[i];
                if (tempObj.tagName == "INPUT" && tempObj.type == "checkbox") {
                    tempObj.checked = false;
                }
                setChildUnChecked(tempObj);
            }
        }

        function setChildChecked(divID) {
            var objchild = divID.children;
            var count = objchild.length;
            for (var i = 0; i < objchild.length; i++) {
                var tempObj = objchild[i];
                if (tempObj.tagName == "INPUT" && tempObj.type == "checkbox") {
                    tempObj.checked = true;
                }
                setChildChecked(tempObj);
            }
        }

        function getHideValue(node) {
            var objchild = public_GetParentByTagName(node, "td").getElementsByTagName("input");
            for (var i = 0; i < objchild.length; i++) {
                var tempObj = objchild[i];
                if (tempObj.tagName == "INPUT" && tempObj.type == "hidden") {
                    alert(tempObj.value);
                }
            }
        }
    </script>

</head>
<body>
    <form id="form1" runat="server">
    <div>
    </div>
    <asp:TreeView ID="TreeView1" runat="server">
    </asp:TreeView>
    </form>
</body>
</html>

【100分】如何给asp:TreeView控件里的CheckBox的Value赋值，让前台JS可以取到

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