Asp.Net中控制TreeView中CheckBox的JS脚本

Code
// JScript 文件

function OnTreeNodeChecked(treeClientID) 
{ 
    var ele = event.srcElement;
    if (ele.tagName=='A')
    {
        var id;
        id = ele.id.replace(treeClientID,'').replace('t','');
        ele = document.getElementById(treeClientID+'n'+id+'CheckBox');
        ele.checked = ! ele.checked;
    }
    else if (ele.tagName=='IMG' && ele.parentNode.tagName=='A')
    {
        var id;
        id = ele.parentNode.id.replace(treeClientID,'').replace('t','').replace('i','');
        if (id.substring(0,1)=='n')
        {
            return;
        }
        ele = document.getElementById(treeClientID+'n'+id+'CheckBox');
        ele.checked = ! ele.checked;
    }
    if(ele.type=='checkbox') 
    { 
        var childrenDivID = ele.id.replace('CheckBox','Nodes');
        var div = document.getElementById(childrenDivID); 
        //设置子类复选框
        if(div != null)
        {
            var checkBoxs = div.getElementsByTagName('INPUT'); 
            for(var i=0;i<checkBoxs.length;i++) 
            { 
                if(checkBoxs[i].type=='checkbox' && ele.checked) 
                checkBoxs[i].checked=ele.checked; 
            }
        }
        //设置父类复选框,未选中则设置父类复选框也未选中
        if (!ele.checked)
        {
            var arrIDColl = GetIDCollByCheckBox(ele,treeClientID);
            var div = document.getElementById(treeClientID);
            var checkBoxs = div.getElementsByTagName('INPUT'); 
            for(var i=0;i<checkBoxs.length;i++) 
            { 
                if(checkBoxs[i].type=='checkbox')
                {
                    var arrSubIDColl = GetIDCollByCheckBox(checkBoxs[i],treeClientID);
                    if (arrIDColl.contains(arrSubIDColl[arrSubIDColl.length-1]))
                    { 
                        checkBoxs[i].checked=ele.checked; 
                    }
                }
            }
        }
        //设置父类复选框,如子类复选框都全中,则选中父类复选框
        else
        {
            SelectParentCheckBox(ele,treeClientID);
        }
    } 
}

function SelectParentCheckBox(checkBox,treeClientID)
{
    var arrIDColl = GetIDCollByCheckBox(checkBox,treeClientID);
    //编号集合代表根节点,没有父复选框
    if (arrIDColl.length<2)
        return;
    var div = document.getElementById(treeClientID);
    //父类编号
    var parentID = arrIDColl[arrIDColl.length-2];
    //根据父类编号遍历所有子复选框
    var checkBoxs = div.getElementsByTagName('INPUT');
    //标记子类是否全选
    var flagQuanXuan = true;
    //顺便遍历出父类复选框
    var parentCheckBox;

    for(var i=0;i<checkBoxs.length;i++) 
    { 
        if(checkBoxs[i].type=='checkbox')
        {
            var arrSubIDColl = GetIDCollByCheckBox(checkBoxs[i],treeClientID);
            //获得父类复选框
            if (arrSubIDColl[arrSubIDColl.length-1]==parentID)
            {
                parentCheckBox = checkBoxs[i];
            }
            if (arrSubIDColl.length<2)
                continue;
            if (arrSubIDColl[arrSubIDColl.length-2]==parentID)
            {
                if (!checkBoxs[i].checked)
                {
                    flagQuanXuan = false;
                    break;
                }
            }
        }
    }
    parentCheckBox.checked = flagQuanXuan;
    SelectParentCheckBox(parentCheckBox,treeClientID);
}
function GetIDCollByCheckBox(checkBox,treeClientID)
{
    var id;
    id = checkBox.id.replace('CheckBox','').replace(treeClientID,'').replace('n','');
    var hrefid = treeClientID+'t'+id;
    var hrefHTML = document.getElementById(hrefid).href;
    var parentid = hrefHTML.replace("javascript:__doPostBack('"+treeClientID+"','","").replace("')","").replace("s","");
    var arrParentID = parentid.split("\\\\");
    return arrParentID;
}

调用方式:
例:treeCategory为TreeView的ID号
this.treeCategory.Attributes.Add("onclick", "OnTreeNodeChecked('"+treeCategory.ClientID+"');");