<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>meun.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=GB18030">
<script type="text/javascript">
/**
*根据标签的类型和名称获取元素
*tagType 标签的类型，比如TD、INPUT、SPAN等
*eleName 标签元素对应的name属性
*
**/
function getElmentsByName(tagType, eleName) {
var arr = [];
if(tagType==""){
alert("Please Input tagType Attribute.");
};
var tags = document.getElementsByTagName(tagType);
if(eleName==""){
alert("Please Input eleName Attribute.");
};
for(var i=0; i<tags.length; i++){
if(tags[i].getAttribute("name")==eleName){
arr.push(tags[i]);
}
}
return arr;
}
/** 根据元素的ID获取元素 **/
function $(id) {
return "string" == typeof id ? document.getElementById(id) : id;
}
/** 属性复制 **/
var Extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
/**
*
*给对象绑定事件
*oTarget 目标对象
*sEventType 事件类型
*fnHandler 调用函数
*
**/
function addEventHandler(oTarget, sEventType, fnHandler) {
if (oTarget.addEventListener) {
oTarget.addEventListener(sEventType, fnHandler, false);
} else if (oTarget.attachEvent) {
oTarget.attachEvent("on" + sEventType, fnHandler);
} else {
oTarget["on" + sEventType] = fnHandler;
}
};
/** 调用对象绑定 **/
var Bind = function(object, fun) {
var args = Array.prototype.slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
}
}
/** 获取元素的绝对X坐标**/
function getElementLeft(element){
var actualLeft = element.offsetLeft;
var current = element.offsetParent;
while (current !== null){
actualLeft += current.offsetLeft;
current = current.offsetParent;
}
return actualLeft;
}
/** 获取元素的绝对Y坐标**/
function getElementTop(element){
var actualTop = element.offsetTop;
var current = element.offsetParent;
while (current !== null){
actualTop += current.offsetTop;
current = current.offsetParent;
}
return actualTop;
}
/**a元素是否等于或者包含b元素 **/
function ifContains(a, b){
if(a.contains ? a.contains(b) || a == b : a.compareDocumentPosition(b) & 16) return true;
return false;
}
/** 获取对象的属性值 **/
function attr(o,attribute){
return o.getAttribute(attribute);
}
Object.extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
/** For 循环 **/
function Each(list, fun){
for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
};
function Event(e){
var oEvent = document.all ? window.event : e;
if (document.all) {
if(oEvent.type == "mouseout") {
oEvent.relatedTarget = oEvent.toElement;
}else if(oEvent.type == "mouseover") {
oEvent.relatedTarget = oEvent.fromElement;
}
oEvent.stopPropagation = function() { this.cancelBubble = true; }
}
return oEvent;
}
var Class = {
create: function() {
return function() {
this.Initialize.apply(this, arguments);
}
}
}
var MeunUtil = Class.create();
MeunUtil.prototype = {
Initialize: function(options){//初始化
var _this = this;
this.SetOptions(options);
this.topTagType = this.options.topTagType;
this.topTagName = this.options.topTagName;
this.topOnClass = this.options.topOnClass;
this.topOffClass = this.options.topOffClass;
this.topMeuns = getElmentsByName(this.topTagType, this.topTagName);
this.relativeAttrName = this.options.relativeAttrName;
this.childOnClass = this.options.childOnClass;
this.childOffClass = this.options.childOffClass;
Each(this.topMeuns,function(o){_this.HoverTopMeun(o);});//处理所有的菜单
},
SetOptions: function(options){ //初始化参数
this.options={
topTagName: "topMeun", //topMeun的class属性
topTagType: "td", //topMeun的标签类型
topOnClass: "", //顶级标签获取焦点样式
topOffClass: "", //顶级标签失去焦点样式
relativeAttrName: "childMeun", //指示下级标签的属性名称
childTagType: "", //下级标签的属性名称
childOnClass: "", //下级标签得到焦点时的样式
childOffClass: "" //下级标签失去焦点时的样式
}
Object.extend(this.options, options || {});
},
HoverTopMeun: function(topMeun){
var _this = this;
var cId = attr(topMeun, _this.relativeAttrName);
var child = $(cId);
if(!child) return;
child.pNode = topMeun;
addEventHandler(topMeun, "mouseover", function(){
topMeun.className = _this.topOnClass;//top的css样式设置
child.className = _this.childOnClass;//child的css样式设置
child.style.top = getElementTop(topMeun) + topMeun.clientHeight;//child的top坐标设置
child.style.left = getElementLeft(topMeun);//child的left坐标设置
});
addEventHandler(topMeun, "mouseout", function(e){
var event = Event(e);
var toElement = event.relatedTarget;//鼠标移动后的所在的对象
var contains = ifContains(child, toElement);
if(!contains){//如果不包含，则说明已经移出去了
topMeun.className = _this.topOffClass;
child.className = _this.childOffClass;
}
});
var spans = child.getElementsByTagName("span");
Each(spans,function(o){
o.pNode = child;//记录当前元素所在的容器
_this.showChildItem(o);
});
},
showChildItem: function(pItem){
var _this = this;
var cContainerId = attr(pItem, _this.relativeAttrName);
var cContainer = $(cContainerId);
if(cContainer) cContainer.pNode = pItem;
addEventHandler(pItem, "mouseover", function(){
pItem.style.backgroundColor = "yellow";
if(!cContainer) return;
var cItems = cContainer.getElementsByTagName("span");
cContainer.className = _this.childOnClass;
cContainer.style.top = getElementTop(pItem);//cContainer的top坐标设置
cContainer.style.left = getElementLeft(pItem) + pItem.clientWidth;//cContainer的left坐标设置
});
addEventHandler(pItem, "mouseout", function(e){
var event = Event(e);
var toElement = event.relatedTarget;//鼠标移动后的所在的对象
if(cContainer && ifContains(cContainer, toElement)){//如果有子元素，并且移到了字元素块里
return;
}
if(cContainer) cContainer.className = _this.childOffClass;//隐藏子元素
if(ifContains(pItem.pNode, toElement) || pItem.pNode.pNode==toElement){//移动到了包含其它元素里||父亲元素
pItem.style.backgroundColor = "#CC5500";
}else if(pItem.pNode.pNode && pItem.pNode.pNode.pNode && ifContains(pItem.pNode.pNode.pNode, toElement)){//移动到了父亲容器
pItem.style.backgroundColor = "#CC5500";
pItem.pNode.className = _this.childOffClass;
pItem.pNode.pNode.style.backgroundColor = "#CC5500";
}else {//完全移出去了
pItem.style.backgroundColor = "#CC5500";
var cur = pItem.pNode;
while(cur){
if(!attr(cur, _this.relativeAttrName)){
cur.className = _this.childOffClass;
}else {
if(cur.pNode){
cur.style.backgroundColor = "#CC5500";
}else {//如果已经没有父亲元素，则为最上级，css样式不一样
cur.className = _this.topOffClass;
}
}
cur = cur.pNode;
}
}
});
if(!cContainer) return;
var spans = cContainer.getElementsByTagName("span");
var _arguments = arguments;
Each(spans,function(o){
o.pNode = cContainer;//记录当前元素所在的容器
_arguments.callee.call(_this, o);
});
}
};
</script>
<style type="text/css">
.mainMeunOff{
border: 2px solid #999999;
padding: 5px 15px;
background-color: #CC0000;
width: 100px;
width: 96px\9; /**For IE, contains padding**/
text-align: center;
}
.mainMeunOn{
border: 2px solid #999999;
padding: 5px 15px;
background-color: #CCEEEE;
width: 100px;
width: 96px\9; /**For IE, contains padding**/
text-align: center;
cursor: pointer;
}
.item_off{
position: absolute;
visibility:hidden;
line-height: 20px;
}
.item_on{
position: absolute;
visibility:visible;
line-height: 20px;
}
.item_off span{
background-color: #CC5500;
border: 2px solid #999999;
display:block;
width: 100px;
width: 130px\9; /**For IE, contains padding**/
padding: 5px 15px;
}
.item_on span{
background-color: #CC5500;
border: 2px solid #999999;
display:block;
width: 100px;
width: 130px\9; /**For IE, contains padding**/
padding: 5px 15px;
}
</style>
</head>
<body style="text-align: center;margin: 50px 100px;" >
<table >
<tr>
<td class="mainMeunOff" name="topMeun" childMeun="cItem_1">菜单一</td>
<td class="mainMeunOff" name="topMeun" childMeun="cItem_2">菜单二</td>
<td class="mainMeunOff" name="topMeun" childMeun="cItem_3">菜单三</td>
<td class="mainMeunOff" name="topMeun"childMeun="cItem_4">菜单四</td>
</tr>
</table>
<div class="item_off" id="cItem_1">
<span>Item 1_1</span>
<span childMeun="cItem_1_2">Item 1_2 —></span>
<span childMeun="cItem_1_3">Item 1_3 -></span>
<span>Item 1_4</span>
</div>
<div class="item_off" id="cItem_2">
<span>Item 2_1</span>
<span childMeun="cItem_2_1">Item 2_2 -></span>
<span>Item 2_3</a></span>
<span>Item 2_4</span>
</div>
<div class="item_off" id="cItem_3">
<span>Item 3_1</span>
<span>Item 3_2</span>
<span>Item 3_3</span>
<span>Item 3_4</span>
</div>
<div class="item_off" id="cItem_4">
<span>Item 4_1</span>
<span>Item 4_2</span>
<span>Item 4_3</span>
<span>Item 4_4</span>
</div>
<div class="item_off" id="cItem_1_2">
<span>Item 1_2_1</span>
<span>Item 1_2_2</span>
<span>Item 1_2_3</span>
<span>Item 1_2_4</span>
</div>
<div class="item_off" id="cItem_1_3">
<span>Fun 1_2_1</span>
<span>Item 1_3_2</span>
</div>
<div class="item_off" id="cItem_2_1">
<span childMeun="cItem_2_1_1">Java_boy -></span>
<span>Item 2_1_2</span>
</div>
<div class="item_off" id="cItem_2_1_1">
<span>Item Jack</span>
<span>Item Frame</span>
<span>Item Sina</span>
<span>Item World</span>
<span childMeun="cItem_dw">Item Baidu-></span>
<span>Item Google</span>
</div>
<div class="item_off" id="cItem_dw">
<span>Item Daiwei</span>
<span>Item Shan</span>
</div>
<div>
<span id="msg"></span>
</div>
<script>
new MeunUtil({
childTagType:"span",
childOffClass:"item_off",
childOnClass:"item_on",
topOffClass:"mainMeunOff",
topOnClass:"mainMeunOn"
});
</script>
</body>
</html>
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