Your IP : 216.73.216.170
/*
*
*
* Licensed under the terms of the GNU Lesser General Public License:
* http://www.opensource.org/licenses/lgpl-license.php
*
* File Name: linkage.js
*
* Version: 1.1
* Modified: 2006-7-20 15:31:48
*
* File Authors:
* 张亚楠 (zhangyanan2008@gmail.com)
*
* Thanks To:
* HopeSoftStudio (http://www.10090.com)
*
* Online Demo & Download:
* http://www.wofeila.com/test/menu/menu.htm
* http://www.wofeila.com/test/menu/menu.rar
*/
var Linkage = Class.create();
Linkage.prototype = {
initialize : function(dataSrc, xmlFile) {
this.dataSrc = dataSrc;
this.xmlFile = xmlFile;
},
dataSrc : "" ,
xmlFile : "" ,
//初始化SELECT列表时的默认值
BLANK_SELECT : "-----请选择-----" ,
//三维数组 总的数据数组
AllMenuArr : new Array() ,
//二维数组 应用的表单(SELECT)元素数组
MenuIdArr : new Array() ,
//各分支数据级组
MenuInfoArr : new Array() ,
//遍历XML时，记录当前元素深度
iDepth : -1 ,
tree : function(dataSrc, Element) {
var node = "";
if(Element.nodeType != 3) {
node = Element;
this.onElement(dataSrc, Element);
}
if(Element.hasChildNodes) {
for(var i=0;i<Element.childNodes.length;i++) {
if (Element.childNodes[i].nodeType != 3) {
this.iDepth++;
this.tree(dataSrc, Element.childNodes[i]);
}
}
}
if(node) {
this.endElement();
}
} ,
onElement : function(dataSrc, ele) {
if ($V(ele, "Value") != null) {
if (this.MenuInfoArr[dataSrc] == null) {
this.MenuInfoArr[dataSrc] = new Array();
}
if (this.MenuInfoArr[dataSrc][this.iDepth] == null) {
this.MenuInfoArr[dataSrc][this.iDepth] = new Array();
}
this.MenuInfoArr[dataSrc][this.iDepth].push(new MenuInfo($V(ele.parentNode, "Value") , $V(ele, "Value") , ($V(ele, "Desc")==null ? $V(ele, "Value") : $V(ele, "Desc"))));
}
} ,
endElement : function() {
this.iDepth--;
} ,
//初始化空的SELECT
initBlank : function(element) {
element.length = 0;
element.options.add(new Option( this.BLANK_SELECT, "" ));
element.selectedIndex = 0;
} ,
//初始化下级以下菜单
updateAllLast : function(dataSrc, nLevel) {
for(i = nLevel+1; i < this.MenuIdArr[dataSrc].length; i++) {
childNode = $(this.MenuIdArr[dataSrc][i]);
this.initBlank(childNode);
childNode.disabled = true;
}
} ,
//重新生成下级列表的值，初始化下级以下菜单
initLinkage : function(dataSrc, sValue, nLevel) {
nLevel = Number(nLevel);
if (nLevel > this.MenuIdArr[dataSrc].length || nLevel < 1) {
return;
}
currNode = $(this.MenuIdArr[dataSrc][nLevel-1]);
childNode = $(this.MenuIdArr[dataSrc][nLevel]);
if (currNode.disabled) {
return;
}
for (i=0; i<currNode.options.length; i++) {
if (currNode.options[i].value == sValue) {
currNode.selectedIndex = i;
break;
}
}
if (childNode != null) {
currArr = this.AllMenuArr[dataSrc][nLevel];
this.initBlank(childNode);
for(i=0; i<currArr.length; i++) {
if (currArr[i].parentValue == sValue) {
childNode.options.add(new Option(currArr[i].Desc, currArr[i].Value));
}
}
if ((sValue != '') && (childNode.length > 1)) {
childNode.disabled = false;
} else {
childNode.disabled = true;
}
}
this.updateAllLast(dataSrc, nLevel);
} ,
changeLinkage : function(element) {
this.initLinkage($V(element , "USEDATA"), $F(element), $V(element , "SUBCLASS"));
} ,
setDataSrc : function(dataSrc) {
this.dataSrc = dataSrc;
} ,
setXmlFile : function(xmlFile) {
this.xmlFile = xmlFile;
} ,
//初始化，加载数据，生成第一组下拉列表，初始化其它下拉列表
init : function() {
//得到XML文档的根节点
var rootEle = loadXML(this.dataSrc, this.xmlFile);
this.tree(this.dataSrc, rootEle);
this.iDepth = -1;
//初始化总数据数组
for (i=0; i<this.MenuInfoArr[this.dataSrc].length; i++) {
if (this.AllMenuArr[this.dataSrc] == null) {
this.AllMenuArr[this.dataSrc] = new Array();
}
this.AllMenuArr[this.dataSrc].push(this.MenuInfoArr[this.dataSrc][i]);
}
//初始化应用元素数组
var selectNodes = document.getElementsByTagName("select");
for (i=0; i<selectNodes.length; i++) {
if ($V(selectNodes[i] , "USEDATA") == this.dataSrc) {
if (this.MenuIdArr[this.dataSrc] == null) {
this.MenuIdArr[this.dataSrc] = new Array();
}
var subClass = Number($V(selectNodes[i] , "SUBCLASS")) - 1;
this.MenuIdArr[this.dataSrc][subClass] = $V(selectNodes[i] , "id");
Event.observe(selectNodes[i], "change", this.changeLinkage.bind(this, selectNodes[i]));
//new Form.Element.EventObserver(selectNodes[i], this.changeLinkage.bind(this));
}
}
//初始化第一个列表
firstNode = $(this.MenuIdArr[this.dataSrc].first());
this.initBlank(firstNode);
for (i=0; i<this.AllMenuArr[this.dataSrc].first().length; i++) {
firstNode.options.add(new Option(this.AllMenuArr[this.dataSrc].first()[i].Desc, this.AllMenuArr[this.dataSrc].first()[i].Value));
}
//初始化其它列表
this.updateAllLast(this.dataSrc, 0);
}
}
//基本数据对象(父名称及本身名称)
var MenuInfo = Class.create();
MenuInfo.prototype = {
initialize : function(sParentValue, sValue, sDesc) {
this.parentValue = sParentValue;
this.Value = sValue;
this.Desc = sDesc;
}
}
//得到当前Element的属性值
function $V(ele, attr) {
return ele.getAttribute(attr);
}
//生成XML对象
function createXMLDom() {
if (window.ActiveXObject)
var xmldoc = new ActiveXObject("Microsoft.XMLDOM");
else
if (document.implementation&&document.implementation.createDocument)
var xmldoc = document.implementation.createDocument("","doc",null);
xmldoc.async = false;
//为了和FireFox一至，这里不能改为False;
xmldoc.preserveWhiteSpace=true;
return xmldoc;
}
//加载XML数据
function loadXML(dataSrc, xmlFile) {
if (xmlFile == null) {
if (window.ActiveXObject) {
return $(dataSrc).documentElement;
} else {
for (i=0; i<$(dataSrc).childNodes.length; i++) {
if ($(dataSrc).childNodes[i].tagName != null) {
return $(dataSrc).childNodes[i];
break;
}
}
}
} else {
var xmlDom = createXMLDom();
try{
xmlDom.load(xmlFile);
}catch(e){
alert("数据文件加载失败！");
}
return xmlDom.documentElement;
}
}
/**
用作行业类别选项卡用，暂时内置在这个js文件里
*/
function changeTab(tabIndex)
{
tabCount = 4;
for (i = 1; i <= tabCount; i++)
{
tab = document.getElementById("IndustryTab" + i);
//content = document.getElementById("TopTenContent" + i);
if (i == tabIndex)
{
tab.className = "menu_w14";
//content.className = "activecontent";
}
else
{
tab.className = "menu";
//content.className = "hiddencontent";
}
}
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