var mtDropDown; //静态类变量
mtDropDown.spacerGif = "/script/menuIMG/x.gif";
mtDropDown.dingbatOn = "/script/menuIMG/CUE.gif";
mtDropDown.dingbatOff = "/script/menuIMG/CUE.gif";
mtDropDown.dingbatSize = 14;
mtDropDown.menuPadding = 1;
mtDropDown.itemPadding = 2;
mtDropDown.shadowSize = 2;
mtDropDown.shadowOffset = 3;
mtDropDown.shadowColor = "#888";
mtDropDown.shadowPng = "/script/menuIMG/grey-40.png";
mtDropDown.backgroundColor = "#ffffff";
mtDropDown.backgroundPng = "/script/menuIMG/white-90.png";
mtDropDown.hideDelay = 1000;
mtDropDown.slideTime = 200;
mtDropDown.reference ={
topLeft:1,topRight:2,bottomLeft:3,bottomRight:4
};
mtDropDown.direction ={
down:1,right:2
};
mtDropDown.registry = [];
mtDropDown._maxZ = 100;
mtDropDown.isSupported = function(){
if (typeof(mtDropDown.isSupported.r) == "boolean"){
return mtDropDown.isSupported.r;
}
var ua = navigator.userAgent.toLowerCase();
var an = navigator.appName;
var r = false;
if (ua.indexOf("gecko") > -1){
r = true;
}
else if (an == "Microsoft Internet Explorer"){
if (document.getElementById){
r = true;
}
}
mtDropDown.isSupported.r = r;
return r;
}
mtDropDown.initialize = function(){
for (var i = 0, menu = null; menu = this.registry[i]; i++){
menu.initialize();
}
}
mtDropDown.renderAll = function(){
var aMenuHtml = [];
for (var i = 0, menu = null; menu = this.registry[i]; i++){
aMenuHtml[i] = menu.toString();
}
document.write(aMenuHtml.join(""));
}
function mtDropDown(oActuator, iDirection, iLeft, iTop, iReferencePoint, parentMenuSet){
this.addItem = addItem;
this.addMenu = addMenu;
this.toString = toString;
this.initialize = initialize;
this.isOpen = false;
this.show = show;
this.hide = hide;
this.items = [];
this.onactivate = new Function();
this.ondeactivate = new Function();
this.onmouseover = new Function();
this.onqueue = new Function();
this.index = mtDropDown.registry.length;
mtDropDown.registry[this.index] = this;
var id = "mtDropDown" + this.index;
var contentHeight = null;
var contentWidth = null;
var childMenuSet = null;
var animating = false;
var childMenus = [];
var slideAccel = -1;
var elmCache = null;
var ready = false;
var _this = this;
var a = null;
var pos = iDirection == mtDropDown.direction.down ? "top" : "left";
var dim = null;
function addItem(sText, sUrl){
var item = new mtDropDownItem(sText, sUrl, this);
item._index = this.items.length;
this.items[item._index] = item;
}
function addMenu(oMenuItem){
if (!oMenuItem.parentMenu == this) throw new Error("Cannot add a menu here");
if (childMenuSet == null) childMenuSet = new mtDropDownSet(mtDropDown.direction.right, -5, 2, mtDropDown.reference.topRight);
var m = childMenuSet.addMenu(oMenuItem);
childMenus[oMenuItem._index] = m;
m.onmouseover = child_mouseover;
m.ondeactivate = child_deactivate;
m.onqueue = child_queue;
return m;
}
function initialize(){
initCache();
initEvents();
initSize();
ready = true;
}
function show(){
if (ready){
_this.isOpen = true;
animating = true;
setContainerPos();
elmCache["clip"].style.visibility = "visible";
elmCache["clip"].style.zIndex = mtDropDown._maxZ++;
slideStart();
_this.onactivate();
}
}
function hide(){
if (ready){
_this.isOpen = false;
animating = true;
for (var i = 0, item = null; item = elmCache.item[i]; i++)
dehighlight(item);
if (childMenuSet) childMenuSet.hide();
slideStart();
_this.ondeactivate();
}
}
function setContainerPos(){
var sub = oActuator.constructor == mtDropDownItem;
var act = sub ? oActuator.parentMenu.elmCache["item"][oActuator._index] : oActuator;
var el = act;
var x = 0;
var y = 0;
var minX = 0;
var maxX = (window.innerWidth ? window.innerWidth : document.body.clientWidth) - parseInt(elmCache["clip"].style.width);
var minY = 0;
var maxY = (window.innerHeight ? window.innerHeight : document.body.clientHeight) - parseInt(elmCache["clip"].style.height);
while (sub ? el.parentNode.className.indexOf("mtDropdownMenu") == -1 : el.offsetParent){
x += el.offsetLeft;
y += el.offsetTop;
if (el.scrollLeft) x -= el.scrollLeft;
if (el.scrollTop) y -= el.scrollTop;
el = el.offsetParent;
}
if (oActuator.constructor == mtDropDownItem){
x += parseInt(el.parentNode.style.left);
y += parseInt(el.parentNode.style.top);
}
switch (iReferencePoint){
case mtDropDown.reference.topLeft:
break;
case mtDropDown.reference.topRight:
x += act.offsetWidth;
break;
case mtDropDown.reference.bottomLeft:
y += act.offsetHeight;
break;
case mtDropDown.reference.bottomRight:
x += act.offsetWidth;
y += act.offsetHeight;
break;
}
x += iLeft;
y += iTop;
x = Math.max(Math.min(x, maxX), minX);
y = Math.max(Math.min(y, maxY), minY);
elmCache["clip"].style.left = x + "px";
elmCache["clip"].style.top = y + "px";
}
function slideStart(){
var x0 = parseInt(elmCache["content"].style[pos]);
var x1 = _this.isOpen ? 0 : -dim;
if (a != null) a.stop();
a = new Accelimation(x0, x1, mtDropDown.slideTime, slideAccel);
a.onframe = slideFrame;
a.onend = slideEnd;
a.start();
}
function slideFrame(x){
elmCache["content"].style[pos] = x + "px";
}
function slideEnd(){
if (!_this.isOpen) elmCache["clip"].style.visibility = "hidden";
animating = false;
}
function initSize(){
var ow = elmCache["items"].offsetWidth;
var oh = elmCache["items"].offsetHeight;
var ua = navigator.userAgent.toLowerCase();
elmCache["clip"].style.width = ow + mtDropDown.shadowSize + 2 + "px";
elmCache["clip"].style.height = oh + mtDropDown.shadowSize + 2 + "px";
elmCache["content"].style.width = ow + mtDropDown.shadowSize + "px";
elmCache["content"].style.height = oh + mtDropDown.shadowSize + "px";
contentHeight = oh + mtDropDown.shadowSize;
contentWidth = ow + mtDropDown.shadowSize;
dim = iDirection == mtDropDown.direction.down ? contentHeight : contentWidth;
elmCache["content"].style[pos] = -dim - mtDropDown.shadowSize + "px";
elmCache["clip"].style.visibility = "hidden";
if (ua.indexOf("mac") == -1 || ua.indexOf("gecko") > -1){
elmCache["background"].style.width = ow + "px";
elmCache["background"].style.height = oh + "px";
elmCache["background"].style.backgroundColor = mtDropDown.backgroundColor;
elmCache["shadowRight"].style.left = ow + "px";
elmCache["shadowRight"].style.height = oh - (mtDropDown.shadowOffset - mtDropDown.shadowSize) + "px";
elmCache["shadowRight"].style.backgroundColor = mtDropDown.shadowColor;
elmCache["shadowBottom"].style.top = oh + "px";
elmCache["shadowBottom"].style.width = ow - mtDropDown.shadowOffset + "px";
elmCache["shadowBottom"].style.backgroundColor = mtDropDown.shadowColor;
}
else{
elmCache["background"].firstChild.src = mtDropDown.backgroundPng;
elmCache["background"].firstChild.width = ow;
elmCache["background"].firstChild.height = oh;
elmCache["shadowRight"].firstChild.src = mtDropDown.shadowPng;
elmCache["shadowRight"].style.left = ow + "px";
elmCache["shadowRight"].firstChild.width = mtDropDown.shadowSize;
elmCache["shadowRight"].firstChild.height = oh - (mtDropDown.shadowOffset - mtDropDown.shadowSize);
elmCache["shadowBottom"].firstChild.src = mtDropDown.shadowPng;
elmCache["shadowBottom"].style.top = oh + "px";
elmCache["shadowBottom"].firstChild.height = mtDropDown.shadowSize;
elmCache["shadowBottom"].firstChild.width = ow - mtDropDown.shadowOffset;
}
}
function initCache(){
var menu = document.getElementById(id);
var all = menu.all ? menu.all : menu.getElementsByTagName("*");
elmCache ={
};
elmCache["clip"] = menu;
elmCache["item"] = [];
for (var i = 0, elm = null; elm = all[i]; i++){
switch (elm.className){
case "items":
case "content":
case "background":
case "shadowRight":
case "shadowBottom":
elmCache[elm.className] = elm;
break;
case "item":
elm._index = elmCache["item"].length;
elmCache["item"][elm._index] = elm;
break;
}
}
_this.elmCache = elmCache;
}
function initEvents(){
for (var i = 0, item = null; item = elmCache.item[i]; i++){
item.onmouseover = item_mouseover;
item.onmouseout = item_mouseout;
item.onclick = item_click;
}
if (typeof oActuator.tagName != "undefined"){
oActuator.onmouseover = actuator_mouseover;
oActuator.onmouseout = actuator_mouseout;
}
elmCache["content"].onmouseover = content_mouseover;
elmCache["content"].onmouseout = content_mouseout;
}
function highlight(oRow){
oRow.className = "item hover";
if (childMenus[oRow._index])
oRow.lastChild.firstChild.src = mtDropDown.dingbatOn;
}
function dehighlight(oRow){
oRow.className = "item";
if (childMenus[oRow._index])
oRow.lastChild.firstChild.src = mtDropDown.dingbatOff;
}
function item_mouseover(){
if (!animating){
highlight(this);
if (childMenus[this._index]) childMenuSet.showMenu(childMenus[this._index]);
else if (childMenuSet) childMenuSet.hide();
}
}
function item_mouseout(){
if (!animating){
if (childMenus[this._index])
childMenuSet.hideMenu(childMenus[this._index]);
else
dehighlight(this);
}
}
function item_click(){
if (!animating){
if (_this.items[this._index].url)
location.href = _this.items[this._index].url;
}
}
function actuator_mouseover(){
parentMenuSet.showMenu(_this);
}
function actuator_mouseout(){
parentMenuSet.hideMenu(_this);
}
function content_mouseover(){
if (!animating){
parentMenuSet.showMenu(_this);
_this.onmouseover();
}
}
function content_mouseout(){
if (!animating){
parentMenuSet.hideMenu(_this);
}
}
function child_mouseover(){
if (!animating){
parentMenuSet.showMenu(_this);
}
}
function child_deactivate(){
for (var i = 0; i < childMenus.length; i++){
if (childMenus[i] == this){
dehighlight(elmCache["item"][i]);
break;
}
}
}
function child_queue(){
parentMenuSet.hideMenu(_this);
}
function toString(){
var aHtml = [];
var sClassName = "mtDropdownMenu" + (oActuator.constructor != mtDropDownItem ? " top" : "");
for (var i = 0, item = null; item = this.items[i]; i++){
aHtml[i] = item.toString(childMenus[i]);
}
return '' +
'
' +
' |
' +
aHtml.join('') +
' |
' +
'
' +
'
' +
'
' +
'
| ' +
sText + ' | ' +
' |
';
}
}
function Accelimation(from, to, time, zip){
if (typeof zip == "undefined") zip = 0;
if (typeof unit == "undefined") unit = "px";
this.x0 = from;
this.x1 = to;
this.dt = time;
this.zip = -zip;
this.unit = unit;
this.timer = null;
this.onend = new Function();
this.onframe = new Function();
}
Accelimation.prototype.start = function(){
this.t0 = new Date().getTime();
this.t1 = this.t0 + this.dt;
var dx = this.x1 - this.x0;
this.c1 = this.x0 + ((1 + this.zip) * dx / 3);
this.c2 = this.x0 + ((2 + this.zip) * dx / 3);
Accelimation._add(this);
}
Accelimation.prototype.stop = function(){
Accelimation._remove(this);
}
Accelimation.prototype._paint = function(time){
if (time < this.t1){
var elapsed = time - this.t0;
this.onframe(Accelimation._getBezier(elapsed/this.dt,this.x0,this.x1,this.c1,this.c2));
}
else this._end();
}
Accelimation.prototype._end = function(){
Accelimation._remove(this);
this.onframe(this.x1);
this.onend();
}
Accelimation._add = function(o){
var index = this.instances.length;
this.instances[index] = o;
if (this.instances.length == 1){
this.timerID = window.setInterval("Accelimation._paintAll()", this.targetRes);
}
}
Accelimation._remove = function(o){
for (var i = 0; i < this.instances.length; i++){
if (o == this.instances[i]){
this.instances = this.instances.slice(0,i).concat( this.instances.slice(i+1) );
break;
}
}
if (this.instances.length == 0){
window.clearInterval(this.timerID);
this.timerID = null;
}
}
Accelimation._paintAll = function(){
var now = new Date().getTime();
for (var i = 0; i < this.instances.length; i++){
this.instances[i]._paint(now);
}
}
Accelimation._B1 = function(t){
return t*t*t
}
Accelimation._B2 = function(t){
return 3*t*t*(1-t)
}
Accelimation._B3 = function(t){
return 3*t*(1-t)*(1-t)
}
Accelimation._B4 = function(t){
return (1-t)*(1-t)*(1-t)
}
Accelimation._getBezier = function(percent,startPos,endPos,control1,control2){
return endPos * this._B1(percent) + control2 * this._B2(percent) + control1 * this._B3(percent) + startPos * this._B4(percent);
}
Accelimation.instances = [];
Accelimation.targetRes = 10;
Accelimation.timerID = null;