如何使TreeView子节点的Check状态与父节点一致？顶者有分！

Question

这段代码是树的代码，能够选择当前节点的check时子节点的状态和父节点一样。
我想加一点功能就是让子节的check为false时，父节点的check为false
但我不懂jscript，不知在哪加
   <script type="text/jscript">
        function client_OnTreeNodeChecked()
        {
            var obj = window.event.srcElement;
            var treeNodeFound = false;
            var checkedState;
            if (obj.tagName == "INPUT" && obj.type == "checkbox") 
            {
                var treeNode = obj;
                checkedState = treeNode.checked;
                do
                {
                 obj = obj.parentElement;
                } 
             while (obj.tagName != "TABLE")
                var parentTreeLevel = obj.rows[0].cells.length;
                var parentTreeNode = obj.rows[0].cells[0];
                var tables = obj.parentElement.getElementsByTagName("TABLE");
                var numTables = tables.length
                if (numTables >= 1)
                {
                    for (i=0; i < numTables; i++)
                    {
                        if (tables[i] == obj)
                        {
                            treeNodeFound = true;
                            i++;
                            if (i == numTables)
                            {
                                return;
                            }
                        }
                        if (treeNodeFound == true)
                        {
                            var childTreeLevel = tables[i].rows[0].cells.length;
                            if (childTreeLevel > parentTreeLevel)
                            {
                                var cell = tables[i].rows[0].cells[childTreeLevel - 1];
                                var inputs = cell.getElementsByTagName("INPUT");
                                inputs[0].checked = checkedState;
                            }
                            else
                            {
                                return;
                            }
                        }
                    }
                }
            }
        }
    </script>

Answer 1

<script type="text/jscript">
        function  UncheckParent (obj)
        {   
        
            
            while(obj !=  null)
            {
                var tagName = obj.tagName.toLowerCase();
                
                if(tagName == "div" && obj.id == "TreeView1")
                {
                    return;
                }
                
               
                if( tagName==  "table")
                {
                     var checkBox = obj.getElementsByTagName("INPUT");
                    
                    if(checkBox.length >0)
                    {
                        checkBox[0].checked = false;
                    }
                    obj = obj.parentElement.previousSibling;
                   
                }else
               
                
                obj = obj.parentElement;
            }
        }
        function client_OnTreeNodeChecked()
        {   
            
            var obj = window.event.srcElement;
            var treeNodeFound = false;
            var checkedState;
            if (obj.tagName == "INPUT" && obj.type == "checkbox") 
            {
                var treeNode = obj;
                checkedState = treeNode.checked;
                if(!checkedState)
                {
                    UncheckParent(obj);
                     
                }
                
                
                do
                {
                 obj = obj.parentElement;
                } 
                while (obj.tagName != "TABLE")
                 
                var parentTreeLevel = obj.rows[0].cells.length;
                var parentTreeNode = obj.rows[0].cells[0];
            
                var tables = obj.parentElement.getElementsByTagName("TABLE");
                var numTables = tables.length
                if (numTables >= 1)
                {
                    for (i=0; i < numTables; i++)
                    {
                        if (tables[i] == obj)
                        {
                            treeNodeFound = true;
                            i++;
                            if (i == numTables)
                            {
                                return;
                            }
                        }
                        if (treeNodeFound == true)
                        {
                            var childTreeLevel = tables[i].rows[0].cells.length;
                            if (childTreeLevel > parentTreeLevel)
                            {
                                var cell = tables[i].rows[0].cells[childTreeLevel - 1];
                                var inputs = cell.getElementsByTagName("INPUT");
                                inputs[0].checked = checkedState;
                            }
                            else
                            {
                                return;
                            }
                        }
                    }
                }
            }
        }
    </script>