function public_GetParentByTagName(element, tagName)  
{ 
    var parent = element.parentNode; 
    var upperTagName = tagName.toUpperCase(); 
    //如果這個(gè)元素還不是想要的tag就繼續(xù)上溯 
    while (parent && (parent.tagName.toUpperCase() != upperTagName))  
    { 
        parent = parent.parentNode ? parent.parentNode : parent.parentElement; 
    } 
    return parent; 
} 
//設(shè)置節(jié)點(diǎn)的父節(jié)點(diǎn)Cheched——該節(jié)點(diǎn)可訪問(wèn)，則他的父節(jié)點(diǎn)也必能訪問(wèn) 
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); 
} 
//設(shè)置節(jié)點(diǎn)的子節(jié)點(diǎn)uncheched——該節(jié)點(diǎn)不可訪問(wèn)，則他的子節(jié)點(diǎn)也不能訪問(wèn) 
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);  
    } 
} 
//設(shè)置節(jié)點(diǎn)的子節(jié)點(diǎn)cheched——該節(jié)點(diǎn)可以訪問(wèn)，則他的子節(jié)點(diǎn)也都能訪問(wèn) 
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);  
    } 
} 
//觸發(fā)事件 
function CheckEvent() 
{ 
    var objNode = event.srcElement;  
    if(objNode.tagName!="INPUT" || objNode.type!="checkbox") 
    return; 
    if(objNode.checked==true) 
    { 
        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") 
        { 
            return; 
        }  
        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") 
        { 
            return; 
        }  
        setChildUnChecked(objParentDiv); 
    } 
} 