玩转动感滑动透明菜单(一)

来源：互联网发布：软件实施面试自我介绍编辑：程序博客网时间：2024/05/02 01:34

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>玩转动感滑动透明菜单(一)</TITLE>

<META content="text/html; charset=gb2312" http-equiv=Content-Type>
<META content="MSHTML 5.00.3502.5390" name=GENERATOR>

</HEAD>
<BODY bgcolor="#FDEEEE" onload=init();>
<p> 玩转动感滑动透明菜单(一)：(Make By <em>CSDN</em> <em><strong><a href="mailto:nba23@vbnc.net">nba23</a></strong></em>
8/6/2003 )<br>
</p>
<TABLE width="70%" border=0 align=center cellPadding=0 cellSpacing=0 >
<TBODY>
<TR>
      <TD vAlign=top height=24><A id=menu1
            onmouseover="swapImage('button1', preloaded[1][1].src)"
            onmouseout="swapImage('button1', preloaded[1][0].src)"
            href="http://www.csdn.net"><IMG src="images/1-0.gif"
            name=button1 width="68" height="25" border=0
            id=button1></A></TD>
      <TD vAlign=top height=24><a id=menu2
            onMouseOver="swapImage('button2', preloaded[2][1].src)"
            onMouseOut="swapImage('button2', preloaded[2][0].src)"
            href="http://www.csdn.net"><img src="images/2-0.gif"
            name=button2 width="68" height="25" border=0
            id=button2></a></TD>
      <TD vAlign=top height=24><A id=menu3
            onmouseover="swapImage('button3', preloaded[3][1].src)"
            onmouseout="swapImage('button3', preloaded[3][0].src)"
            href="http://www.csdn.net"><IMG src="images/3-0.gif"
            name=button3 width="68" height="25" border=0
            id=button3></A></TD>
      <TD vAlign=top height=24><A id=menu4
            onmouseover="swapImage('button4', preloaded[4][1].src)"
            onmouseout="swapImage('button4', preloaded[4][0].src)"
            href="http://www.csdn.net"><IMG src="images/4-0.gif"
            name=button4 width="68" height="25" border=0
            id=button4></A></TD>
      <TD vAlign=top height=24><A id=menu5
            onmouseover="swapImage('button5', preloaded[5][1].src)"
            onmouseout="swapImage('button5', preloaded[5][0].src)"
            href="http://www.csdn.net"><IMG src="images/5-0.gif"
            name=button5 width="68" height="25" border=0
            id=button5></A></TD>
      <TD vAlign=top height=24><A id=menu6
            onmouseover="swapImage('button6', preloaded[6][1].src)"
            onmouseout="swapImage('button6', preloaded[6][0].src)"
            href="http://www.csdn.net"><IMG
            src="images/6-0.gif"
          name=button6 width="68" height="25" border=0 id=button6></A></TD>
    </TR></TBODY></TABLE>

sytle.css
--------------------------------
A{
COLOR: #ooo; TEXT-DECORATION:none
}
A:link {
COLOR: #039
}
A:visited {
COLOR: #039
}
A:hover {
COLOR: #f60
}
.mtDropdownMenu {
LEFT: -1imagespx; OVERFLOW: hidden; POSITION: absolute; TOP: -1imagespx
}
.mtDropdownMenu .content {
POSITION: absolute
}
.mtDropdownMenu .items {
BORDER-BOTTOM: #999 1px solid; BORDER-LEFT: #999 1px solid; BORDER-RIGHT: #999 1px solid; BORDER-TOP: #999 1px solid; LEFT: 0px; POSITION: relative; TOP: 0px; Z-INDEX: 2
}
.mtDropdownMenu .item {
BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-RIGHT: medium none; BORDER-TOP: medium none; COLOR: #333333; CURSOR: hand; FONT-FAMILY: "Verdana", "Arial", "Helvetica", "sans-serif"; FONT-SIZE: 12px; TEXT-DECORATION: none; EXT-DECORATION: none
}
.mtDropdownMenu .background {
FILTER: alpha(opacity=75); LEFT: 0px; POSITION: absolute; TOP: 0px; Z-INDEX: 1; moz-opacity: .8
}
.mtDropdownMenu .shadowRight {
FILTER: alpha(opacity=40); POSITION: absolute; TOP: 3px; WIDTH: 2px; Z-INDEX: 3; moz-opacity: .4
}
.mtDropdownMenu .shadowBottom {
FILTER: alpha(opacity=40); HEIGHT: 2px; LEFT: 3px; POSITION: absolute; Z-INDEX: 1; moz-opacity: .4
}
.mtDropdownMenu .hover {
BACKGROUND: #cccccc; COLOR: #ffffff
}
.mtDropdownMenu .item IMG {
MARGIN-LEFT: 10px
}

dropdownC.js
-----------------------------------------
<!--
mtDropDown.spacerGif = "";
mtDropDown.dingbatOn = "";
mtDropDown.dingbatOff = "";
mtDropDown.dingbatSize = 14;
mtDropDown.menuPadding = 1;
mtDropDown.itemPadding = 4;
mtDropDown.shadowSize = 2;
mtDropDown.shadowOffset = 3;
mtDropDown.shadowColor = "#888"; //菜单边框阴影
mtDropDown.shadowPng = "";
mtDropDown.backgroundColor = "#ffffff"; //菜单底色
mtDropDown.backgroundPng = "";
mtDropDown.hideDelay = 200; //菜单隐藏时间
mtDropDown.slideTime = 300; //菜单显示时间

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;

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 '<div id="' + id + '" class="' + sClassName + '">' +
'<div class="content"><table class="items" cellpadding="0" cellspacing="0" border="0">' +
'<tr><td colspan="2"><img src="' + mtDropDown.spacerGif + '" width="1" height="' + mtDropDown.menuPadding + '"></td></tr>' +
aHtml.join('') +
'<tr><td colspan="2"><img src="' + mtDropDown.spacerGif + '" width="1" height="' + mtDropDown.menuPadding + '"></td></tr></table>' +
'<div class="shadowBottom"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' +
'<div class="shadowRight"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' +
'<div class="background"><img src="' + mtDropDown.spacerGif + '" width="1" height="1"></div>' +
'</div></div>';
}
}

mtDropDownSet.registry = [];
function mtDropDownSet(iDirection, iLeft, iTop, iReferencePoint) {

this.addMenu = addMenu;
this.showMenu = showMenu;
this.hideMenu = hideMenu;
this.hide = hide;

var menus = [];
var _this = this;
var current = null;
this.index = mtDropDownSet.registry.length;
mtDropDownSet.registry[this.index] = this;

function addMenu(oActuator) {
var m = new mtDropDown(oActuator, iDirection, iLeft, iTop, iReferencePoint, this);
menus[menus.length] = m;
return m;
}
function showMenu(oMenu) {
if (oMenu != current) {

if (current != null) hide(current);

current = oMenu;

oMenu.show();
}
else {

cancelHide(oMenu);
}
}
function hideMenu(oMenu) {

if (current == oMenu && oMenu.isOpen) {

if (!oMenu.hideTimer) scheduleHide(oMenu);
}
}
function scheduleHide(oMenu) {

oMenu.onqueue();
oMenu.hideTimer = window.setTimeout("mtDropDownSet.registry[" + _this.index + "].hide(mtDropDown.registry[" + oMenu.index + "])", mtDropDown.hideDelay);
}
function cancelHide(oMenu) {

if (oMenu.hideTimer) {
window.clearTimeout(oMenu.hideTimer);
oMenu.hideTimer = null;
}
}
function hide(oMenu) {
if (!oMenu && current) oMenu = current;
if (oMenu && current == oMenu && oMenu.isOpen) {

cancelHide(oMenu);
current = null;
oMenu.hideTimer = null;
oMenu.hide();
}
}
}

function mtDropDownItem(sText, sUrl, oParent) {
this.toString = toString;
this.text = sText;
this.url = sUrl;
this.parentMenu = oParent;
function toString(bDingbat) {
var sDingbat = bDingbat ? mtDropDown.dingbatOff : mtDropDown.spacerGif;
var iEdgePadding = mtDropDown.itemPadding + mtDropDown.menuPadding;
var sPaddingLeft = "padding:" + mtDropDown.itemPadding + "px; padding-left:" + iEdgePadding + "px;"
var sPaddingRight = "padding:" + mtDropDown.itemPadding + "px; padding-right:" + iEdgePadding + "px;"
return '<tr class="item"><td nowrap style="' + sPaddingLeft + '">' +
sText + '</td></tr>';

}
}

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;
//-->

dropdown_initialize.js
------------------------------------
<!--
var preloaded = [];

  for (var i = 1; i <= 6; i++) {
   preloaded[i] = [loadImage(i + "-0.gif"), loadImage(i + "-1.gif")];
  }

function init() {

if (mtDropDown.isSupported()) {
mtDropDown.initialize();

menu1.onactivate = function() { swapImage("button1", preloaded[1][1].src) };
menu1.ondeactivate = function() { swapImage("button1", preloaded[1][0].src) };

menu2.onactivate = function() { swapImage("button2", preloaded[2][1].src) };
menu2.ondeactivate = function() { swapImage("button2", preloaded[2][0].src) };

menu3.onactivate = function() { swapImage("button3", preloaded[3][1].src) };
menu3.ondeactivate = function() { swapImage("button3", preloaded[3][0].src) };

menu4.onactivate = function() { swapImage("button4", preloaded[4][1].src) };
menu4.ondeactivate = function() { swapImage("button4", preloaded[4][0].src) };

menu5.onactivate = function() { swapImage("button5", preloaded[5][1].src) };
menu5.ondeactivate = function() { swapImage("button5", preloaded[5][0].src) };

    menu6.onactivate = function() { swapImage("button6", preloaded[6][1].src) };
    menu6.ondeactivate = function() { swapImage("button6", preloaded[6][0].src) };
   }
  }

  function loadImage(sFilename) {
   var img = new Image();
   img.src ="images/" + sFilename;
   return img;
  }

  function swapImage(imgName, sFilename) {
   document.images[imgName].src = sFilename;
  }//-->

dropdown_content.js
------------------------------------
<!--
//定义下拉菜单地址,要增加下拉栏的列数，自行添加吧

if (mtDropDown.isSupported()) {

var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);

  var menu3 = ms.addMenu(document.getElementById("menu3"));
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");
  menu3.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");

  var menu4 = ms.addMenu(document.getElementById("menu4"));
  menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");
  menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");
  menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");
  menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");
  menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");

mtDropDown.renderAll();
}