一个简单的javascript菜单

时间：2007-02-17 来源：PHP爱好者

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>AgetimeMenu Demo</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style>
.agetime_bar{
position:absolute;top:0px;left:0px;width:100%;border:1px outset;background-color:RGB(212,208,200);z-index:98;
}
.agetime_barItem{
width:60px;border:1px solid RGB(212,208,200);text-align:left;padding-left:10px;
background:RGB(212,208,200);color:#000000;font-size:9pt;
}
.agetime_barItemDown{
width:60px;border:1px inset RGB(212,208,200);text-align:left;padding-left:10px;
background:#F0F0F0;color:#000000;font-size:9pt;
}
.agetime_barItemHover{
width:60px;border:1 outset;text-align:left;padding-left:10px;
background:#F0F0F0;color:#000000;font-size:9pt;
}
.agetime_pad{
cursor:default;font-size:9pt;width:100%;
}
.agetime_padItem{
width:100%;border:1px solid RGB(212,208,200);text-align:left;padding-left:10px;
background:RGB(212,208,200);color:#000000;font-size:9pt;
}
.agetime_padItemFalse{
padding-left:10px;font-size:9pt; color:#808080;
}
.agetime_padItemFalseHover{
padding-left:10px;font-size:9pt; color:#808080;background-color:#333366;
}
.agetime_padItemHover{
width:100%;text-align:left;padding-left:10px;
background-color:#333366;color:#FFFFFF;font-size:9pt;
}
.agetime_padItemDown{
width:100%;text-align:left;padding-left:10px;border:1px inset;
background-color:#9999CC;color:#FFFFFF;font-size:9pt;
}
.agetime_hr{
border:1px inset;
}
.agetime_board{
background-color:RGB(212,208,200);border:2px outset;
}
</style>
</head>
<body>
<script language="javascript">
var menu = agetimeMenu("agetime",
[
[
["文件",null,null,true,"打开文件"], //显示文字,方法,命令,状态,状栏显示文字
["打开",null,null,false,"打开文件"],
["--"],
["你好","js","alert('Hello')",true,"一声问候"],
["新窗口","ABC","about:blank",true,"弹出ABC窗口"],
["空白",null,"about:blank",true,"在当前窗口显示空白页"]
],
[
["编辑",null,null,false,"打开文件"],
["撤消",null,null,true,"打开文件"],
["重做",null,null,true,"打开文件"]
],
[
["文件","js","alert('无子菜单')",true,"打开文件"]
]
]
);
//方法为"js"时,命令则为javascript语句,为非"js"值时,命令则是一个URL,而打开这个URL的目标位置则是方法所指定的窗口;
//["你好","js","alert('Hello'),true,"一声问候"];
//显示文字为"--"是按钮是一个分隔符;

function agetimeMenu(id,array){
var menu=this;
menu.pad=null; //装载各个子菜单
menu.barItems=[]; //菜单条的各位按钮
menu.pads=[]; //每个子菜单为一个table存放于menu.pad上;
menu.selectedIndex=-1; //菜单条选中按钮的索引值
menu.board=null; //子菜单面板

//建立菜单条
this.crtMenuBar=function(){
var len=array.length;
menu.bar = document.body.appendChild(document.createElement('div'));
menu.bar.className=id+"_bar";
for(var i=0;i<len;i++){
menu.barItems=menu.addMenuBarItem(array[0],i);
menu.addMenuPad(array,i);
}
}

//子菜单
this.addMenuPad=function(ary,index){
var len=ary.length;
var pad=menu.crtElement("table",menu.pad);
pad.cellSpacing=1; pad.cellPadding=0;
pad.className=id+"_pad";
pad.style.display="none";
for(var i=1;i<len;i++){
var Row=pad.insertRow(i-1);
menu.addMenuPadItem(ary,Row);
}
menu.pads[index]=pad;
}

//各子菜单按钮
this.addMenuPadItem=function(ary,Row){
var Cell=Row.insertCell(0);
if(ary[0]!="--"){
Cell.innerText=ary[0];
if(ary[3]){ //有效状态;
Cell.className=id+"_padItem";
Cell.onmouseover=function(){
Cell.className=id+"_padItemHover";
window.status=ary[4];
}
Cell.onmouseout=function(){
Cell.className=id+"_padItem";
window.status="";
}
Cell.onmousedown=function(){ Cell.className=id+"_padItemDown"; }
Cell.onmouseup=function(){
Cell.className=id+"_padItemHover";
menu.hideMenu();
menu.execute(ary);
}
}
else{ //按钮无效;
Cell.className=id+"_padItemFalse";
Cell.onmouseover=function(){
Cell.className=id+"_padItemFalseHover";
window.status=ary[4];
}
Cell.onmouseout=function(){
Cell.className=id+"_padItemFalse";
window.status="";
}
}
}
else{
var hr=menu.crtElement("hr",Cell);
hr.className=id+"_hr";
}
Cell.onclick=function(){
event.cancelBubble=true;
}
}

//菜单条的按钮
this.addMenuBarItem=function(ary,index){
var item=menu.crtElement("button",menu.bar);
item.value=ary[0];
item.disabled=!ary[3];
item.className=id+"_barItem";
item.onmouseover=function(){
if(menu.selectedIndex==-1){
item.className=id+"_barItemHover";
}
else{
menu.barItems[selectedIndex].className=id+"_barItem";
item.className=id+"_barItemDown";
menu.showMenu(index);
}
window.status=ary[4];
}
item.onmouseout=function(){
if(menu.selectedIndex==-1) item.className=id+"_barItem";
window.status="";
}
item.onclick=function(){
event.cancelBubble=true;
if(menu.selectedIndex==-1){
item.className=id+"_barItemDown";
menu.showMenu(index);
}
else{
menu.hideMenu();
item.className=id+"_barItemHover";
}
menu.execute(ary);
item.blur();
}
return item;
}

//显示子菜单
this.showMenu=function(index){
if(menu.selectedIndex!=-1) menu.pads[selectedIndex].style.display="none";
menu.board.style.pixelLeft=menu.barItems[index].offsetLeft+2;
//menu.board.style.pixelHeight="";
if(menu.pads[index].rows.length>0) menu.board.style.display="";
else menu.board.style.display="none";
menu.pads[index].style.display="";
menu.selectedIndex=index;
}
//隐藏子菜单
this.hideMenu=function(){
if(menu.selectedIndex==-1) return;
menu.barItems[menu.selectedIndex].className=id+"_barItem";
menu.pads[selectedIndex].style.display="none";
menu.selectedIndex=-1;
menu.board.style.display="none";
}

//执行菜单命令;
this.execute=function(ary){
if(ary[2]==null) return;
if(ary[1]=="js") { eval(ary[2]); menu.hideMenu(); }
else if(ary[1]==null || ary[1].toLowerCase=="_self") location.href=ary[2];
else{ var x=window.open(ary[2],ary[1]); x.focus(); }
}

//建立子菜单的显示面板
this.crtMenuBoard=function(){
document.write(
"<div id='"+id+"_board' style='position:absolute;width:160px;left:0px;top:20px;background-color:#666666;z-index:99;display:none;'>"+
"<div style='position:absolute;width:100%;left:0px;top:0px;'>"+
"<iframe id='"+id+"_frame' name='"+id+"_frame' width='100%' height='100%' frameborder='0' scrolling='no'></iframe>"+
"</div>"+
"<div id='"+id+"_pad' style='position:absolute;width:100%;left:0px;top:0px;'></div>"+
"</div>"
);
menu.board=document.getElementById(id+"_board");
menu.pad=document.getElementById(id+"_pad");
menu.pad.className=id+"_board";
menu.pad.onselectstart=function(){ return false;}
}

//增加对像的一个子元素
this.crtElement=function(el,p){
return p.appendChild(document.createElement(el));
}

//安装菜单;
this.setup=function(){
menu.crtMenuBoard();
menu.crtMenuBar();
document.attachEvent("onclick",menu.hideMenu);
}

menu.setup();
}
</script>
</body>
</html>

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