玩转动感滑动透明菜单(一)

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<HTML><HEAD><TITLE>玩转动感滑动透明菜单(一)</TITLE>

</SCRIPT>

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</HEAD>

<p> 玩转动感滑动透明菜单(一)：(Make By <em>CSDN</em> <em><strong><a [url=mailto:nba23@vbnc.net]href="mailto:nba23@vbnc.net">nba23</a></strong></em>

8/6/2003 )<br>

</p>

<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>

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</CENTER><br></BODY></HTML>

sytle.css

--------------------------------

COLOR: #ooo; TEXT-DECORATION:none

}

A:link {

COLOR: #039

}

A:visited {

COLOR: #039

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A:hover {

COLOR: #f60

}

.mtDropdownMenu {

LEFT: -1imagespx; OVERFLOW: hidden; POSITION: absolute; TOP: -1imagespx

}

.mtDropdownMenu .content {

POSITION: absolute

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.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;

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else if (an == "Microsoft Internet Explorer") {

if (document.getElementById) r = true;

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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 '<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 menu1 = ms.addMenu(document.getElementById("menu1"));

menu1.addItem(" WEB开发 ", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");

var menu2 = ms.addMenu(document.getElementById("menu2"));

menu2.addItem(" 多媒体/设计", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=7&typenum=1&whichpage=1");

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");

var menu4 = ms.addMenu(document.getElementById("menu4"));

menu4.addItem(" 21世纪邮箱 ", "http://www.21cn.com");

var menu5 = ms.addMenu(document.getElementById("menu5"));

menu5.addItem(" WEB开发", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=3&typenum=1&whichpage=1");

var menu6 = ms.addMenu(document.getElementById("menu6"));

menu6.addItem(" 多媒体/设计", "http://expert.csdn.net/expert/forum.asp?url=/Expert/ForumsList.asp?roomid=7&typenum=1&whichpage=1");

mtDropDown.renderAll();

}