个人的blog上面很多都是在转贴别人做过的一些经典的程序或思想，今天贴上一个自己写好的小js的例子。
鼠标经过的图像显示下拉菜单
相信很多人在网上随便搜一下鼠标经过的图像显示下拉菜单的代码会搜索到相应的代码，在此先将代码贴出来
function MM_callJS(jsStr) 
{ //v2.0
return eval(jsStr)
}
function Menu(label, mw, mh, fnt, fs, fclr, fhclr, bg, bgh, halgn, valgn, pad, space, to, sx, sy, srel, opq, vert, idt, aw, ah)
{
this.version = "020320 [Menu; mm_menu.js]";
this.type = "Menu";
this.menuWidth = mw;
this.menuItemHeight = mh;
this.fontSize = fs;
this.fontWeight = "plain";
this.fontFamily = fnt;
this.fontColor = fclr;
this.fontColorHilite = fhclr;
this.bgColor = "#555555";
this.menuBorder = 1;
this.menuBgOpaque=opq;
this.menuItemBorder = 1;
this.menuItemIndent = idt;
this.menuItemBgColor = bg;
this.menuItemVAlign = valgn;
this.menuItemHAlign = halgn;
this.menuItemPadding = pad;
this.menuItemSpacing = space;
this.menuLiteBgColor = "#ffffff";
this.menuBorderBgColor = "#777777";
this.menuHiliteBgColor = bgh;
this.menuContainerBgColor = "#cccccc";
this.childMenuIcon = "arrows.gif";
this.submenuXOffset = sx;
this.submenuYOffset = sy;
this.submenuRelativeToItem = srel;
this.vertical = vert;
this.items = new Array();
this.actions = new Array();
this.childMenus = new Array();
this.hideOnMouseOut = true;
this.hideTimeout = to;
this.addMenuItem = addMenuItem;
this.writeMenus = writeMenus;
this.MM_showMenu = MM_showMenu;
this.onMenuItemOver = onMenuItemOver;
this.onMenuItemAction = onMenuItemAction;
this.hideMenu = hideMenu;
this.hideChildMenu = hideChildMenu;
if (!window.menus) window.menus = new Array();
this.label = " " + label;
window.menus[this.label] = this;
window.menus[window.menus.length] = this;
if (!window.activeMenus) window.activeMenus = new Array();
}
function addMenuItem(label, action) {
this.items[this.items.length] = label;
this.actions[this.actions.length] = action;
}
function FIND(item) {
if( window.mmIsOpera ) return(document.getElementById(item));
if (document.all) return(document.all[item]);
if (document.getElementById) return(document.getElementById(item));
return(false);
}
function writeMenus(container) {
if (window.triedToWriteMenus) return;
var agt = navigator.userAgent.toLowerCase();
window.mmIsOpera = agt.indexOf("opera") != -1;
if (!container && document.layers) {
window.delayWriteMenus = this.writeMenus;
var timer = setTimeout('delayWriteMenus()', 500);
container = new Layer(100);
clearTimeout(timer);
} else if (document.all || document.hasChildNodes || window.mmIsOpera) {
document.writeln('<span id="menuContainer"></span>');
container = FIND("menuContainer");
}
window.mmHideMenuTimer = null;
if (!container) return;
window.triedToWriteMenus = true;
container.isContainer = true;
container.menus = new Array();
for (var i=0; i<window.menus.length; i++)
container.menus[i] = window.menus[i];
window.menus.length = 0;
var countMenus = 0;
var countItems = 0;
var top = 0;
var content = '';
var lrs = false;
var theStat = "";
var tsc = 0;
if (document.layers) lrs = true;
for (var i=0; i<container.menus.length; i++, countMenus++) {
var menu = container.menus[i];
if (menu.bgImageUp || !menu.menuBgOpaque) {
menu.menuBorder = 0;
menu.menuItemBorder = 0;
}
if (lrs) {
var menuLayer = new Layer(100, container);
var lite = new Layer(100, menuLayer);
lite.top = menu.menuBorder;
lite.left = menu.menuBorder;
var body = new Layer(100, lite);
body.top = menu.menuBorder;
body.left = menu.menuBorder;
} else {
content += ''+
'<div id="menuLayer'+ countMenus +'" style="position:absolute;z-index:1;left:10px;top:'+ (i * 100) +'px;visibility:hidden;color:' + menu.menuBorderBgColor + ';">\n'+
' <div id="menuLite'+ countMenus +'" style="position:absolute;z-index:1;left:'+ menu.menuBorder +'px;top:'+ menu.menuBorder +'px;visibility:hide;" onmouseout="mouseoutMenu();">\n'+
' <div id="menuFg'+ countMenus +'" style="position:absolute;left:'+ menu.menuBorder +'px;top:'+ menu.menuBorder +'px;visibility:hide;">\n'+
'';
}
var x=i;
for (var i=0; i<menu.items.length; i++) {
var item = menu.items[i];
var childMenu = false;
var defaultHeight = menu.fontSize+2*menu.menuItemPadding;
if (item.label) {
item = item.label;
childMenu = true;
}
menu.menuItemHeight = menu.menuItemHeight || defaultHeight;
var itemProps = '';
if( menu.fontFamily != '' ) itemProps += 'font-family:' + menu.fontFamily +';';
itemProps += 'font-weight:' + menu.fontWeight + ';fontSize:' + menu.fontSize + 'px;';
if (menu.fontStyle) itemProps += 'font-style:' + menu.fontStyle + ';';
if (document.all || window.mmIsOpera)
itemProps += 'font-size:' + menu.fontSize + 'px;" onmouseover="onMenuItemOver(null,this);" onclick="onMenuItemAction(null,this);';
else if (!document.layers) {
itemProps += 'font-size:' + menu.fontSize + 'px;';
}
var l;
if (lrs) {
var lw = menu.menuWidth;
if( menu.menuItemHAlign == 'right' ) lw -= menu.menuItemPadding;
l = new Layer(lw,body);
}
var itemLeft = 0;
var itemTop = i*menu.menuItemHeight;
if( !menu.vertical ) {
itemLeft = i*menu.menuWidth;
itemTop = 0;
}
var dTag = '<div id="menuItem'+ countItems +'" style="position:absolute;left:' + itemLeft + 'px;top:'+ itemTop +'px;'+ itemProps +'">';
var dClose = '</div>'
if (menu.bgImageUp) dTag = '<div id="menuItem'+ countItems +'" style="background:url('+menu.bgImageUp+');position:absolute;left:' + itemLeft + 'px;top:'+ itemTop +'px;'+ itemProps +'">';
var left = 0, top = 0, right = 0, bottom = 0;
left = 1 + menu.menuItemPadding + menu.menuItemIndent;
right = left + menu.menuWidth - 2*menu.menuItemPadding - menu.menuItemIndent;
if( menu.menuItemVAlign == 'top' ) top = menu.menuItemPadding;
if( menu.menuItemVAlign == 'bottom' ) top = menu.menuItemHeight-menu.fontSize-1-menu.menuItemPadding;
if( menu.menuItemVAlign == 'middle' ) top = ((menu.menuItemHeight/2)-(menu.fontSize/2)-1);
bottom = menu.menuItemHeight - 2*menu.menuItemPadding;
var textProps = 'position:absolute;left:' + left + 'px;top:' + top + 'px;';
if (lrs) {
textProps +=itemProps + 'right:' + right + ';bottom:' + bottom + ';';
dTag = "";
dClose = "";
}
if(document.all && !window.mmIsOpera) {
item = '<div align="' + menu.menuItemHAlign + '">' + item + '</div>';
} else if (lrs) {
item = '<div style="text-align:' + menu.menuItemHAlign + ';">' + item + '</div>';
} else {
var hitem = null;
if( menu.menuItemHAlign != 'left' ) {
if(window.mmIsOpera) {
var operaWidth = menu.menuItemHAlign == 'center' ? -(menu.menuWidth-2*menu.menuItemPadding) : (menu.menuWidth-6*menu.menuItemPadding);
hitem = '<div id="menuItemHilite' + countItems + 'Shim" style="position:absolute;top:1px;left:' + menu.menuItemPadding + 'px;width:' + operaWidth + 'px;text-align:'
+ menu.menuItemHAlign + ';visibility:visible;">' + item + '</div>';
item = '<div id="menuItemText' + countItems + 'Shim" style="position:absolute;top:1px;left:' + menu.menuItemPadding + 'px;width:' + operaWidth + 'px;text-align:'
+ menu.menuItemHAlign + ';visibility:visible;">' + item + '</div>';
} else {
hitem = '<div id="menuItemHilite' + countItems + 'Shim" style="position:absolute;top:1px;left:1px;right:-' + (left+menu.menuWidth-3*menu.menuItemPadding) + 'px;text-align:'
+ menu.menuItemHAlign + ';visibility:visible;">' + item + '</div>';
item = '<div id="menuItemText' + countItems + 'Shim" style="position:absolute;top:1px;left:1px;right:-' + (left+menu.menuWidth-3*menu.menuItemPadding) + 'px;text-align:'
+ menu.menuItemHAlign + ';visibility:visible;">' + item + '</div>';
}
} else hitem = null;
}
if(document.all && !window.mmIsOpera) item = '<div id="menuItemShim' + countItems + '" style="position:absolute;left:0px;top:0px;">' + item + '</div>';
var dText = '<div id="menuItemText'+ countItems +'" style="' + textProps + 'color:'+ menu.fontColor +';">'+ item +' </div>\n'
+ '<div id="menuItemHilite'+ countItems +'" style="' + textProps + 'color:'+ menu.fontColorHilite +';visibility:hidden;">'
+ (hitem||item) +' </div>';
if (childMenu) content += ( dTag + dText + '<div id="childMenu'+ countItems +'" style="position:absolute;left:0px;top:3px;"><img src="'+ menu.childMenuIcon +'"></div>\n' + dClose);
else content += ( dTag + dText + dClose);
if (lrs) {
l.document.open("text/html");
l.document.writeln(content);
l.document.close();
content = '';
theStat += "-";
tsc++;
if (tsc > 50) {
tsc = 0;
theStat = "";
}
status = theStat;
}
countItems++;
}
if (lrs) {
var focusItem = new Layer(100, body);
focusItem.visiblity="hidden";
focusItem.document.open("text/html");
focusItem.document.writeln(" ");
focusItem.document.close();
} else {
content += ' <div id="focusItem'+ countMenus +'" style="position:absolute;left:0px;top:0px;visibility:hide;" onclick="onMenuItemAction(null,this);"> </div>\n';
content += ' </div>\n </div>\n</div>\n';
}
i=x;
}
if (document.layers) {
container.clip.width = window.innerWidth;
container.clip.height = window.innerHeight;
container.onmouseout = mouseoutMenu;
container.menuContainerBgColor = this.menuContainerBgColor;
for (var i=0; i<container.document.layers.length; i++) {
proto = container.menus[i];
var menu = container.document.layers[i];
container.menus[i].menuLayer = menu;
container.menus[i].menuLayer.Menu = container.menus[i];
container.menus[i].menuLayer.Menu.container = container;
var body = menu.document.layers[0].document.layers[0];
body.clip.width = proto.menuWidth || body.clip.width;
body.clip.height = proto.menuHeight || body.clip.height;
for (var n=0; n<body.document.layers.length-1; n++) {
var l = body.document.layers[n];
l.Menu = container.menus[i];
l.menuHiliteBgColor = proto.menuHiliteBgColor;
l.document.bgColor = proto.menuItemBgColor;
l.saveColor = proto.menuItemBgColor;
l.onmouseover = proto.onMenuItemOver;
l.onclick = proto.onMenuItemAction;
l.mmaction = container.menus[i].actions[n];
l.focusItem = body.document.layers[body.document.layers.length-1];
l.clip.width = proto.menuWidth || body.clip.width;
l.clip.height = proto.menuItemHeight || l.clip.height;
if (n>0) {
if( l.Menu.vertical ) l.top = body.document.layers[n-1].top + body.document.layers[n-1].clip.height + proto.menuItemBorder + proto.menuItemSpacing;
else l.left = body.document.layers[n-1].left + body.document.layers[n-1].clip.width + proto.menuItemBorder + proto.menuItemSpacing;
}
l.hilite = l.document.layers[1];
if (proto.bgImageUp) l.background.src = proto.bgImageUp;
l.document.layers[1].isHilite = true;
if (l.document.layers.length > 2) {
l.childMenu = container.menus[i].items[n].menuLayer;
l.document.layers[2].left = l.clip.width -13;
l.document.layers[2].top = (l.clip.height / 2) -4;
l.document.layers[2].clip.left += 3;
l.Menu.childMenus[l.Menu.childMenus.length] = l.childMenu;
}
}
if( proto.menuBgOpaque ) body.document.bgColor = proto.bgColor;
if( proto.vertical ) {
body.clip.width = l.clip.width +proto.menuBorder;
body.clip.height = l.top + l.clip.height +proto.menuBorder;
} else {
body.clip.height = l.clip.height +proto.menuBorder;
body.clip.width = l.left + l.clip.width +proto.menuBorder;
if( body.clip.width > window.innerWidth ) body.clip.width = window.innerWidth;
}
var focusItem = body.document.layers[n];
focusItem.clip.width = body.clip.width;
focusItem.Menu = l.Menu;
focusItem.top = -30;
focusItem.captureEvents(Event.MOUSEDOWN);
focusItem.onmousedown = onMenuItemDown;
if( proto.menuBgOpaque ) menu.document.bgColor = proto.menuBorderBgColor;
var lite = menu.document.layers[0];
if( proto.menuBgOpaque ) lite.document.bgColor = proto.menuLiteBgColor;
lite.clip.width = body.clip.width +1;
lite.clip.height = body.clip.height +1;
menu.clip.width = body.clip.width + (proto.menuBorder * 3) ;
menu.clip.height = body.clip.height + (proto.menuBorder * 3);
}
} else {
if ((!document.all) && (container.hasChildNodes) && !window.mmIsOpera) {
container.innerHTML=content;
} else {
container.document.open("text/html");
container.document.writeln(content);
container.document.close();
}
if (!FIND("menuLayer0")) return;
var menuCount = 0;
for (var x=0; x<container.menus.length; x++) {
var menuLayer = FIND("menuLayer" + x);
container.menus[x].menuLayer = "menuLayer" + x;
menuLayer.Menu = container.menus[x];
menuLayer.Menu.container = "menuLayer" + x;
menuLayer.style.zindex = 1;
var s = menuLayer.style;
s.pixeltop = -300;
s.pixelleft = -300;
s.top = '-300px';
s.left = '-300px';
var menu = container.menus[x];
menu.menuItemWidth = menu.menuWidth || menu.menuIEWidth || 140;
if( menu.menuBgOpaque ) menuLayer.style.backgroundColor = menu.menuBorderBgColor;
var top = 0;
var left = 0;
menu.menuItemLayers = new Array();
for (var i=0; i<container.menus[x].items.length; i++) {
var l = FIND("menuItem" + menuCount);
l.Menu = container.menus[x];
l.Menu.menuItemLayers[l.Menu.menuItemLayers.length] = l;
if (l.addEventListener || window.mmIsOpera) {
l.style.width = menu.menuItemWidth + 'px';
l.style.height = menu.menuItemHeight + 'px';
l.style.pixelWidth = menu.menuItemWidth;
l.style.pixelHeight = menu.menuItemHeight;
l.style.top = top + 'px';
l.style.left = left + 'px';
if(l.addEventListener) {
l.addEventListener("mouseover", onMenuItemOver, false);
l.addEventListener("click", onMenuItemAction, false);
l.addEventListener("mouseout", mouseoutMenu, false);
}
if( menu.menuItemHAlign != 'left' ) {
l.hiliteShim = FIND("menuItemHilite" + menuCount + "Shim");
l.hiliteShim.style.visibility = "inherit";
l.textShim = FIND("menuItemText" + menuCount + "Shim");
l.hiliteShim.style.pixelWidth = menu.menuItemWidth - 2*menu.menuItemPadding - menu.menuItemIndent;
l.hiliteShim.style.width = l.hiliteShim.style.pixelWidth;
l.textShim.style.pixelWidth = menu.menuItemWidth - 2*menu.menuItemPadding - menu.menuItemIndent;
l.textShim.style.width = l.textShim.style.pixelWidth;
}
} else {
l.style.pixelWidth = menu.menuItemWidth;
l.style.pixelHeight = menu.menuItemHeight;
l.style.pixelTop = top;
l.style.pixelLeft = left;
if( menu.menuItemHAlign != 'left' ) {
var shim = FIND("menuItemShim" + menuCount);
shim[0].style.pixelWidth = menu.menuItemWidth - 2*menu.menuItemPadding - menu.menuItemIndent;
shim[1].style.pixelWidth = menu.menuItemWidth - 2*menu.menuItemPadding - menu.menuItemIndent;
shim[0].style.width = shim[0].style.pixelWidth + 'px';
shim[1].style.width = shim[1].style.pixelWidth + 'px';
}
}
if( menu.vertical ) top = top + menu.menuItemHeight+menu.menuItemBorder+menu.menuItemSpacing;
else left = left + menu.menuItemWidth+menu.menuItemBorder+menu.menuItemSpacing;
l.style.fontSize = menu.fontSize + 'px';
l.style.backgroundColor = menu.menuItemBgColor;
l.style.visibility = "inherit";
l.saveColor = menu.menuItemBgColor;
l.menuHiliteBgColor = menu.menuHiliteBgColor;
l.mmaction = container.menus[x].actions[i];
l.hilite = FIND("menuItemHilite" + menuCount);
l.focusItem = FIND("focusItem" + x);
l.focusItem.style.pixelTop = -30;
l.focusItem.style.top = '-30px';
var childItem = FIND("childMenu" + menuCount);
if (childItem) {
l.childMenu = container.menus[x].items[i].menuLayer;
childItem.style.pixelLeft = menu.menuItemWidth -11;
childItem.style.left = childItem.style.pixelLeft + 'px';
childItem.style.pixelTop = (menu.menuItemHeight /2) -4;
childItem.style.top = childItem.style.pixelTop + 'px';
l.Menu.childMenus[l.Menu.childMenus.length] = l.childMenu;
}
l.style.cursor = "hand";
menuCount++;
}
if( menu.vertical ) {
menu.menuHeight = top-1-menu.menuItemSpacing;
menu.menuWidth = menu.menuItemWidth;
} else {
menu.menuHeight = menu.menuItemHeight;
menu.menuWidth = left-1-menu.menuItemSpacing;
}
var lite = FIND("menuLite" + x);
var s = lite.style;
s.pixelHeight = menu.menuHeight +(menu.menuBorder * 2);
s.height = s.pixelHeight + 'px';
s.pixelWidth = menu.menuWidth + (menu.menuBorder * 2);
s.width = s.pixelWidth + 'px';
if( menu.menuBgOpaque ) s.backgroundColor = menu.menuLiteBgColor;
var body = FIND("menuFg" + x);
s = body.style;
s.pixelHeight = menu.menuHeight + menu.menuBorder;
s.height = s.pixelHeight + 'px';
s.pixelWidth = menu.menuWidth + menu.menuBorder;
s.width = s.pixelWidth + 'px';
if( menu.menuBgOpaque ) s.backgroundColor = menu.bgColor;
s = menuLayer.style;
s.pixelWidth = menu.menuWidth + (menu.menuBorder * 4);
s.width = s.pixelWidth + 'px';
s.pixelHeight = menu.menuHeight+(menu.menuBorder*4);
s.height = s.pixelHeight + 'px';
}
}
if (document.captureEvents) document.captureEvents(Event.MOUSEUP);
if (document.addEventListener) document.addEventListener("mouseup", onMenuItemOver, false);
if (document.layers && window.innerWidth) {
window.onresize = NS4resize;
window.NS4sIW = window.innerWidth;
window.NS4sIH = window.innerHeight;
setTimeout("NS4resize()",500);
}
document.onmouseup = mouseupMenu;
window.mmWroteMenu = true;
status = "";
}
function NS4resize() {
if (NS4sIW != window.innerWidth || NS4sIH != window.innerHeight) window.location.reload();
}
function onMenuItemOver(e, l) {
MM_clearTimeout();
l = l || this;
a = window.ActiveMenuItem;
if (document.layers) {
if (a) {
a.document.bgColor = a.saveColor;
if (a.hilite) a.hilite.visibility = "hidden";
if (a.Menu.bgImageOver) a.background.src = a.Menu.bgImageUp;
a.focusItem.top = -100;
a.clicked = false;
}
if (l.hilite) {
l.document.bgColor = l.menuHiliteBgColor;
l.zIndex = 1;
l.hilite.visibility = "inherit";
l.hilite.zIndex = 2;
l.document.layers[1].zIndex = 1;
l.focusItem.zIndex = this.zIndex +2;
}
if (l.Menu.bgImageOver) l.background.src = l.Menu.bgImageOver;
l.focusItem.top = this.top;
l.focusItem.left = this.left;
l.focusItem.clip.width = l.clip.width;
l.focusItem.clip.height = l.clip.height;
l.Menu.hideChildMenu(l);
} else if (l.style && l.Menu) {
if (a) {
a.style.backgroundColor = a.saveColor;
if (a.hilite) a.hilite.style.visibility = "hidden";
if (a.hiliteShim) a.hiliteShim.style.visibility = "inherit";
if (a.Menu.bgImageUp) a.style.background = "url(" + a.Menu.bgImageUp +")";;
}
l.style.backgroundColor = l.menuHiliteBgColor;
l.zIndex = 1;
if (l.Menu.bgImageOver) l.style.background = "url(" + l.Menu.bgImageOver +")";
if (l.hilite) {
l.hilite.style.visibility = "inherit";
if( l.hiliteShim ) l.hiliteShim.style.visibility = "visible";
}
l.focusItem.style.pixelTop = l.style.pixelTop;
l.focusItem.style.top = l.focusItem.style.pixelTop + 'px';
l.focusItem.style.pixelLeft = l.style.pixelLeft;
l.focusItem.style.left = l.focusItem.style.pixelLeft + 'px';
l.focusItem.style.zIndex = l.zIndex +1;
l.Menu.hideChildMenu(l);
} else return;
window.ActiveMenuItem = l;
}
function onMenuItemAction(e, l) {
l = window.ActiveMenuItem;
if (!l) return;
hideActiveMenus();
if (l.mmaction) eval("" + l.mmaction);
window.ActiveMenuItem = 0;
}
function MM_clearTimeout() {
if (mmHideMenuTimer) clearTimeout(mmHideMenuTimer);
mmHideMenuTimer = null;
mmDHFlag = false;
}
function MM_startTimeout() {
if( window.ActiveMenu ) {
mmStart = new Date();
mmDHFlag = true;
mmHideMenuTimer = setTimeout("mmDoHide()", window.ActiveMenu.Menu.hideTimeout);
}
}
function mmDoHide() {
if (!mmDHFlag || !window.ActiveMenu) return;
var elapsed = new Date() - mmStart;
var timeout = window.ActiveMenu.Menu.hideTimeout;
if (elapsed < timeout) {
mmHideMenuTimer = setTimeout("mmDoHide()", timeout+100-elapsed);
return;
}
mmDHFlag = false;
hideActiveMenus();
window.ActiveMenuItem = 0;
}
function MM_showMenu(menu, x, y, child, imgname) {
if (!window.mmWroteMenu) return;
MM_clearTimeout();
if (menu) {
var obj = FIND(imgname) || document.images[imgname] || document.links[imgname] || document.anchors[imgname];
x = moveXbySlicePos (x, obj);
y = moveYbySlicePos (y, obj);
}
if (document.layers) {
if (menu) {
var l = menu.menuLayer || menu;
l.top = l.left = 1;
hideActiveMenus();
if (this.visibility) l = this;
window.ActiveMenu = l;
} else {
var l = child;
}
if (!l) return;
for (var i=0; i<l.layers.length; i++) {
if (!l.layers[i].isHilite) l.layers[i].visibility = "inherit";
if (l.layers[i].document.layers.length > 0) MM_showMenu(null, "relative", "relative", l.layers[i]);
}
if (l.parentLayer) {
if (x != "relative") l.parentLayer.left = x || window.pageX || 0;
if (l.parentLayer.left + l.clip.width > window.innerWidth) l.parentLayer.left -= (l.parentLayer.left + l.clip.width - window.innerWidth);
if (y != "relative") l.parentLayer.top = y || window.pageY || 0;
if (l.parentLayer.isContainer) {
l.Menu.xOffset = window.pageXOffset;
l.Menu.yOffset = window.pageYOffset;
l.parentLayer.clip.width = window.ActiveMenu.clip.width +2;
l.parentLayer.clip.height = window.ActiveMenu.clip.height +2;
if (l.parentLayer.menuContainerBgColor && l.Menu.menuBgOpaque ) l.parentLayer.document.bgColor = l.parentLayer.menuContainerBgColor;
}
}
l.visibility = "inherit";
if (l.Menu) l.Menu.container.visibility = "inherit";
} else if (FIND("menuItem0")) {
var l = menu.menuLayer || menu;
hideActiveMenus();
if (typeof(l) == "string") l = FIND(l);
window.ActiveMenu = l;
var s = l.style;
s.visibility = "inherit";
if (x != "relative") {
s.pixelLeft = x || (window.pageX + document.body.scrollLeft) || 0;
s.left = s.pixelLeft + 'px';
}
if (y != "relative") {
s.pixelTop = y || (window.pageY + document.body.scrollTop) || 0;
s.top = s.pixelTop + 'px';
}
l.Menu.xOffset = document.body.scrollLeft;
l.Menu.yOffset = document.body.scrollTop;
}
if (menu) window.activeMenus[window.activeMenus.length] = l;
MM_clearTimeout();
}
function onMenuItemDown(e, l) {
var a = window.ActiveMenuItem;
if (document.layers && a) {
a.eX = e.pageX;
a.eY = e.pageY;
a.clicked = true;
}
}
function mouseupMenu(e) {
hideMenu(true, e);
hideActiveMenus();
return true;
}
function getExplorerVersion() {
var ieVers = parseFloat(navigator.appVersion);
if( navigator.appName != 'Microsoft Internet Explorer' ) return ieVers;
var tempVers = navigator.appVersion;
var i = tempVers.indexOf( 'MSIE ' );
if( i >= 0 ) {
tempVers = tempVers.substring( i+5 );
ieVers = parseFloat( tempVers );
}
return ieVers;
}
function mouseoutMenu() {
if ((navigator.appName == "Microsoft Internet Explorer") && (getExplorerVersion() < 4.5))
return true;
hideMenu(false, false);
return true;
}
function hideMenu(mouseup, e) {
var a = window.ActiveMenuItem;
if (a && document.layers) {
a.document.bgColor = a.saveColor;
a.focusItem.top = -30;
if (a.hilite) a.hilite.visibility = "hidden";
if (mouseup && a.mmaction && a.clicked && window.ActiveMenu) {
if (a.eX <= e.pageX+15 && a.eX >= e.pageX-15 && a.eY <= e.pageY+10 && a.eY >= e.pageY-10) {
setTimeout('window.ActiveMenu.Menu.onMenuItemAction();', 500);
}
}
a.clicked = false;
if (a.Menu.bgImageOver) a.background.src = a.Menu.bgImageUp;
} else if (window.ActiveMenu && FIND("menuItem0")) {
if (a) {
a.style.backgroundColor = a.saveColor;
if (a.hilite) a.hilite.style.visibility = "hidden";
if (a.hiliteShim) a.hiliteShim.style.visibility = "inherit";
if (a.Menu.bgImageUp) a.style.background = "url(" + a.Menu.bgImageUp +")";
}
}
if (!mouseup && window.ActiveMenu) {
if (window.ActiveMenu.Menu) {
if (window.ActiveMenu.Menu.hideOnMouseOut) MM_startTimeout();
return(true);
}
}
return(true);
}
function hideChildMenu(hcmLayer) {
MM_clearTimeout();
var l = hcmLayer;
for (var i=0; i < l.Menu.childMenus.length; i++) {
var theLayer = l.Menu.childMenus[i];
if (document.layers) theLayer.visibility = "hidden";
else {
theLayer = FIND(theLayer);
theLayer.style.visibility = "hidden";
if( theLayer.Menu.menuItemHAlign != 'left' ) {
for(var j = 0; j < theLayer.Menu.menuItemLayers.length; j++) {
var itemLayer = theLayer.Menu.menuItemLayers[j];
if(itemLayer.textShim) itemLayer.textShim.style.visibility = "inherit";
}
}
}
theLayer.Menu.hideChildMenu(theLayer);
}
if (l.childMenu) {
var childMenu = l.childMenu;
if (document.layers) {
l.Menu.MM_showMenu(null,null,null,childMenu.layers[0]);
childMenu.zIndex = l.parentLayer.zIndex +1;
childMenu.top = l.Menu.menuLayer.top + l.Menu.submenuYOffset;
if( l.Menu.vertical ) {
if( l.Menu.submenuRelativeToItem ) childMenu.top += l.top + l.parentLayer.top;
childMenu.left = l.parentLayer.left + l.parentLayer.clip.width - (2*l.Menu.menuBorder) + l.Menu.menuLayer.left + l.Menu.submenuXOffset;
} else {
childMenu.top += l.top + l.parentLayer.top;
if( l.Menu.submenuRelativeToItem ) childMenu.left = l.Menu.menuLayer.left + l.left + l.clip.width + (2*l.Menu.menuBorder) + l.Menu.submenuXOffset;
else childMenu.left = l.parentLayer.left + l.parentLayer.clip.width - (2*l.Menu.menuBorder) + l.Menu.menuLayer.left + l.Menu.submenuXOffset;
}
if( childMenu.left < l.Menu.container.clip.left ) l.Menu.container.clip.left = childMenu.left;
var w = childMenu.clip.width+childMenu.left-l.Menu.container.clip.left;
if (w > l.Menu.container.clip.width) l.Menu.container.clip.width = w;
var h = childMenu.clip.height+childMenu.top-l.Menu.container.clip.top;
if (h > l.Menu.container.clip.height) l.Menu.container.clip.height = h;
l.document.layers[1].zIndex = 0;
childMenu.visibility = "inherit";
} else if (FIND("menuItem0")) {
childMenu = FIND(l.childMenu);
var menuLayer = FIND(l.Menu.menuLayer);
var s = childMenu.style;
s.zIndex = menuLayer.style.zIndex+1;
if (document.all || window.mmIsOpera) {
s.pixelTop = menuLayer.style.pixelTop + l.Menu.submenuYOffset;
if( l.Menu.vertical ) {
if( l.Menu.submenuRelativeToItem ) s.pixelTop += l.style.pixelTop;
s.pixelLeft = l.style.pixelWidth + menuLayer.style.pixelLeft + l.Menu.submenuXOffset;
s.left = s.pixelLeft + 'px';
} else {
s.pixelTop += l.style.pixelTop;
if( l.Menu.submenuRelativeToItem ) s.pixelLeft = menuLayer.style.pixelLeft + l.style.pixelLeft + l.style.pixelWidth + (2*l.Menu.menuBorder) + l.Menu.submenuXOffset;
else s.pixelLeft = (menuLayer.style.pixelWidth-4*l.Menu.menuBorder) + menuLayer.style.pixelLeft + l.Menu.submenuXOffset;
s.left = s.pixelLeft + 'px';
}
} else {
var top = parseInt(menuLayer.style.top) + l.Menu.submenuYOffset;
var left = 0;
if( l.Menu.vertical ) {
if( l.Menu.submenuRelativeToItem ) top += parseInt(l.style.top);
left = (parseInt(menuLayer.style.width)-4*l.Menu.menuBorder) + parseInt(menuLayer.style.left) + l.Menu.submenuXOffset;
} else {
top += parseInt(l.style.top);
if( l.Menu.submenuRelativeToItem ) left = parseInt(menuLayer.style.left) + parseInt(l.style.left) + parseInt(l.style.width) + (2*l.Menu.menuBorder) + l.Menu.submenuXOffset;
else left = (parseInt(menuLayer.style.width)-4*l.Menu.menuBorder) + parseInt(menuLayer.style.left) + l.Menu.submenuXOffset;
}
s.top = top + 'px';
s.left = left + 'px';
}
childMenu.style.visibility = "inherit";
} else return;
window.activeMenus[window.activeMenus.length] = childMenu;
}
}
function hideActiveMenus() {
if (!window.activeMenus) return;
for (var i=0; i < window.activeMenus.length; i++) {
if (!activeMenus[i]) continue;
if (activeMenus[i].visibility && activeMenus[i].Menu && !window.mmIsOpera) {
activeMenus[i].visibility = "hidden";
activeMenus[i].Menu.container.visibility = "hidden";
activeMenus[i].Menu.container.clip.left = 0;
} else if (activeMenus[i].style) {
var s = activeMenus[i].style;
s.visibility = "hidden";
s.left = '-200px';
s.top = '-200px';
}
}
if (window.ActiveMenuItem) hideMenu(false, false);
window.activeMenus.length = 0;
}
function moveXbySlicePos (x, img) {
if (!document.layers) {
var onWindows = navigator.platform ? navigator.platform == "Win32" : false;
var macIE45 = document.all && !onWindows && getExplorerVersion() == 4.5;
var par = img;
var lastOffset = 0;
while(par){
if( par.leftMargin && ! onWindows ) x += parseInt(par.leftMargin);
if( (par.offsetLeft != lastOffset) && par.offsetLeft ) x += parseInt(par.offsetLeft);
if( par.offsetLeft != 0 ) lastOffset = par.offsetLeft;
par = macIE45 ? par.parentElement : par.offsetParent;
}
} else if (img.x) x += img.x;
return x;
}
function moveYbySlicePos (y, img) {
if(!document.layers) {
var onWindows = navigator.platform ? navigator.platform == "Win32" : false;
var macIE45 = document.all && !onWindows && getExplorerVersion() == 4.5;
var par = img;
var lastOffset = 0;
while(par){
if( par.topMargin && !onWindows ) y += parseInt(par.topMargin);
if( (par.offsetTop != lastOffset) && par.offsetTop ) y += parseInt(par.offsetTop);
if( par.offsetTop != 0 ) lastOffset = par.offsetTop;
par = macIE45 ? par.parentElement : par.offsetParent;
}
} else if (img.y >= 0) y += img.y;
return y;
}
posted on 2006-11-22 18:19
acerbic coffee 阅读(318)
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个人笔记