<HTML>
<head>
<title>多级下拉菜单</title>
<script>
var isDOM = (document.getElementById ? true : false);
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
var popTimer = 0;
var litNow = new Array();
function getRef(id) 
{
if (isDOM) return document.getElementById(id);
if (isIE4) return document.all[id];
if (isNS4) return document.layers[id];
}
function getSty(id) {
return (isNS4 ? getRef(id) : getRef(id).style);
}
function popOver(menuNum, itemNum) {
clearTimeout(popTimer);
hideAllBut(menuNum);
litNow = getTree(menuNum, itemNum);
changeCol(litNow, true);
targetNum = menu[menuNum][itemNum].target;
if (targetNum > 0) {
thisX = parseInt(menu[menuNum][0].ref.left) + parseInt(menu[menuNum][itemNum].ref.left);
thisY = parseInt(menu[menuNum][0].ref.top) + parseInt(menu[menuNum][itemNum].ref.top);
with (menu[targetNum][0].ref) {
left = parseInt(thisX + menu[targetNum][0].x);
top = parseInt(thisY + menu[targetNum][0].y);
visibility = 'visible';
}
}
}
function popOut(menuNum, itemNum) {
if ((menuNum == 0) && !menu[menuNum][itemNum].target)
hideAllBut(0)
else
popTimer = setTimeout('hideAllBut(0)', 500);
}
function getTree(menuNum, itemNum) {
itemArray = new Array(menu.length);
while(1) {
itemArray[menuNum] = itemNum;
if (menuNum == 0) return itemArray;
itemNum = menu[menuNum][0].parentItem;
menuNum = menu[menuNum][0].parentMenu;
}
}
function changeCol(changeArray, isOver) {
for (menuCount = 0; menuCount < changeArray.length; menuCount++) {
if (changeArray[menuCount]) {
newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol;
with (menu[menuCount][changeArray[menuCount]].ref) {
if (isNS4) bgColor = newCol;
else backgroundColor = newCol;
}
}
}
}
function hideAllBut(menuNum) {
var keepMenus = getTree(menuNum, 1);
for (count = 0; count < menu.length; count++)
if (!keepMenus[count])
menu[count][0].ref.visibility = 'hidden';
changeCol(litNow, false);
}
function Menu(isVert, popInd, x, y, width, overCol, backCol, borderClass, textClass) {
this.isVert = isVert;
this.popInd = popInd
this.x = x;
this.y = y;
this.width = width;
this.overCol = overCol;
this.backCol = backCol;
this.borderClass = borderClass;
this.textClass = textClass;
this.parentMenu = null;
this.parentItem = null;
this.ref = null;
}
function Item(text, href, frame, length, spacing, target) {
this.text = text;
this.href = href;
this.frame = frame;
this.length = length;
this.spacing = spacing;
this.target = target;
this.ref = null;
}
function writeMenus() {
if (!isDOM && !isIE4 && !isNS4) return;
for (currMenu = 0; currMenu < menu.length; currMenu++) with (menu[currMenu][0]) {
var str = '', itemX = 0, itemY = 0;
for (currItem = 1; currItem < menu[currMenu].length; currItem++) with (menu[currMenu][currItem]) {
var itemID = 'menu' + currMenu + 'item' + currItem;
var w = (isVert ? width : length);
var h = (isVert ? length : width);
if (isDOM || isIE4) {
str += '<div id="' + itemID + '" style="position: absolute; left: ' + itemX + '; top: ' + itemY + '; width: ' + w + '; height: ' + h + '; visibility: inherit; ';
if (backCol) str += 'background: ' + backCol + '; ';
str += '" ';
}
if (isNS4) {
str += '<layer id="' + itemID + '" left="' + itemX + '" top="' + itemY + '" width="' + w + '" height="' + h + '" visibility="inherit" ';
if (backCol) str += 'bgcolor="' + backCol + '" ';
}
if (borderClass) str += 'class="' + borderClass + '" ';
str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' + currMenu + ',' + currItem + ')">';
str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 0) + '"><tr><td align="left" height="' + (h - 7) + '">' + '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>';
if (target > 0) {
menu[target][0].parentMenu = currMenu;
menu[target][0].parentItem = currItem;
if (popInd) str += '<td class="' + textClass + '" align="right">' + popInd + '</td>';
}
str += '</tr></table>' + (isNS4 ? '</layer>' : '</div>');
if (isVert) itemY += length + spacing;
else itemX += length + spacing;
}
if (isDOM) {
var newDiv = document.createElement('div');
document.getElementsByTagName('body').item(0).appendChild(newDiv);
newDiv.innerHTML = str;
ref = newDiv.style;
ref.position = 'absolute';
ref.visibility = 'hidden';
}
if (isIE4) {
document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' + 'style="position: absolute; visibility: hidden">' + str + '</div>');
ref = getSty('menu' + currMenu + 'div');
}
if (isNS4) {
ref = new Layer(0);
ref.document.write(str);
ref.document.close();
}
for (currItem = 1; currItem < menu[currMenu].length; currItem++) {
itemName = 'menu' + currMenu + 'item' + currItem;
if (isDOM || isIE4) menu[currMenu][currItem].ref = getSty(itemName);
if (isNS4) menu[currMenu][currItem].ref = ref.document[itemName];
}
}
with(menu[0][0]) {
ref.left = x;
ref.top = y;
ref.visibility = 'visible';
}
}
var menu = new Array();
var defOver = '#336699', defBack = '#003366';
var defLength = 22;
menu[0] = new Array();
menu[0][0] = new Menu(false, '', 5, 0, 17, '#669999', '#006666', '', 'itemText');
menu[0][1] = new Item('File', '#', '', 40, 10, 1);
menu[0][2] = new Item('Edit', '#', '', 40, 10, 2);
menu[0][3] = new Item('Help', '#', '', 40, 10, 3);
menu[0][4] = new Item('Site', 'http://www.jojoo.net', '_new', 40, 10, 6);
menu[0][5] = new Item('Other', 'http://www.jojoo.net', '_new', 40, 10, 8);
menu[1] = new Array();
menu[1][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[1][1] = new Item('Open', '#', '', defLength, 0, 0);
menu[1][2] = new Item('Save', '#', '', defLength, 0, 0);
menu[1][3] = new Item('Reopen', '#', '', defLength, 0, 4);
menu[1][4] = new Item('Exit', '#', '', defLength, 0, 0);
menu[2] = new Array();
menu[2][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[2][1] = new Item('Cut', '#', '', defLength, 0, 0);
menu[2][2] = new Item('Copy', '#', '', defLength, 0, 0);
menu[2][3] = new Item('Paste', '#', '', defLength, 0, 0);
menu[3] = new Array();
menu[3][0] = new Menu(true, '<', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[3][1] = new Item('Contents', '#', '', defLength, 0, 0);
menu[3][2] = new Item('Index', '#', '', defLength, 0, 0);
menu[3][3] = new Item('About', '#', '', defLength, 0, 5);
menu[4] = new Array();
menu[4][0] = new Menu(true, '>', 80, 0, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[4][1] = new Item('site1', '#', '', defLength, 0, 0);
menu[4][2] = new Item('site2', '#', '', defLength, 0, 0);
menu[4][3] = new Item('site3', '#', '', defLength, 0, 0);
menu[5] = new Array();
menu[5][0] = new Menu(true, '>', -85, -17, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[5][1] = new Item('Leftwards!<br>And up!', '#', '', 40, 0, 0);
menu[6] = new Array();
menu[6][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[6][1] = new Item('site1', '#', '', defLength, 0, 0);
menu[6][2] = new Item('site2', '#', '', defLength, 0, 7);
menu[6][3] = new Item('site3', '#', '', defLength, 0, 0);
menu[7] = new Array();
menu[7][0] = new Menu(true, '>', 80, 0, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[7][1] = new Item('site21', '#', '', defLength, 0, 0);
menu[7][2] = new Item('site22', '#', '', defLength, 0, 0);
menu[7][3] = new Item('site23', '#', '', defLength, 0, 0);
menu[8] = new Array();
menu[8][0] = new Menu(true, '>', 0, 22, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[8][1] = new Item('other1', '#', '', defLength, 0, 0);
menu[8][2] = new Item('other2', '#', '', defLength, 0, 0);
menu[8][3] = new Item('other3', '#', '', defLength, 0, 9);
menu[9] = new Array();
menu[9][0] = new Menu(true, '>', 80, 0, 80, defOver, defBack, 'itemBorder', 'itemText');
menu[9][1] = new Item('other1', '#', '', defLength, 0, 0);
menu[9][2] = new Item('other2', '#', '', defLength, 0, 0);
menu[9][3] = new Item('other3', '#', '', defLength, 0, 0);
var popOldWidth = window.innerWidth;
nsResizeHandler = new Function('if (popOldWidth != window.innerWidth) location.reload()');
if (isNS4) document.captureEvents(Event.CLICK);
document.onclick = clickHandle;
function clickHandle(evt){
if (isNS4) document.routeEvent(evt);
hideAllBut(0);
}
function moveRoot(){
with(menu[0][0].ref) left = ((parseInt(left) < 100) ? 100 : 5);
}
// End -->
</script>
<style>
<!--
.itemBorder { border: 1px solid black }
.itemText { text-decoration: none; color: #FFFFFF; font: 12px Tahoma,Arial, Helvetica }
.crazyBorder { border: 2px outset #663399 }
.crazyText { text-decoration: none; color: #FFCC99; font: Bold 12px Tahoma,Arial, Helvetica }
-->
</style>
</head>
<body marginwidth="0" marginheight="0" style="margin: 0" onLoad="writeMenus()" onResize="if (isNS4) nsResizeHandler()">
<table bgcolor="#006666" width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="17">
<font size="1"> </font>
</td>
</tr>
</table>
</body>
</HTML>
