Simple drop-down menu example with layer
<html>
<h1>Simple drop-down menu example</h1>
<!--
Example for KLayers project
http://www.kruglov.ru/klayers/
(c) Kruglov S.A. 2002
-->
<!-- klayers.js -->
<script>
/************************************************\
| KLayers 2.97 |
| DHTML Library for Internet Explorer 4.* - 6.*, |
| Netscape 4.* - 7.*, Mozilla, Opera 5.* - 7.* |
| Copyright by Kruglov S. A. (kruglov.ru) 2003 |
\************************************************/
/*** See for description and latest version ***\
\*** http://www.kruglov.ru/klayers/ ***/
function initKLayers(){
isDOM=document.getElementById?true:false
isOpera=isOpera5=window.opera && isDOM
isOpera6=isOpera && window.print
isOpera7=isOpera && document.readyState
isMSIE=isIE=document.all && document.all.item && !isOpera
isStrict=document.compatMode=='CSS1Compat'
isNN=isNC=navigator.appName=="Netscape"
isNN4=isNC4=isNN && !isDOM
isMozilla=isNN6=isNN && isDOM
if(!isDOM && !isNC && !isMSIE && !isOpera){
KLayers=false
return false
}
pageLeft=0
pageTop=0
KL_imgCount=0
KL_imgArray=new Array()
KL_imageRef="document.images[\""
KL_imagePostfix="\"]"
KL_styleSwitch=".style"
KL_layerPostfix="\"]"
if(isNN4){
KL_layerRef="document.layers[\""
KL_styleSwitch=""
}
if(isMSIE){
KL_layerRef="document.all[\""
}
if(isDOM){
KL_layerRef="document.getElementById(\""
KL_layerPostfix="\")"
}
KLayers=true
return true
}
initKLayers()
// document and window functions:
function KL_getBody(w){
if(!w) w=window
if(isStrict){
return w.document.documentElement
}else{
return w.document.body
}
}
function getWindowLeft(w){
if(!w) w=window
if(isMSIE || isOpera7) return w.screenLeft
if(isNN || isOpera) return w.screenX
}
function getWindowTop(w){
if(!w) w=window
if(isMSIE || isOpera7) return w.screenTop
if(isNN || isOpera) return w.screenY
}
function getWindowWidth(w){
if(!w) w=window
if(isMSIE) return KL_getBody(w).clientWidth
if(isNN || isOpera) return w.innerWidth
}
function getWindowHeight(w){
if(!w) w=window
if(isMSIE) return KL_getBody(w).clientHeight
if(isNN || isOpera) return w.innerHeight
}
function getDocumentWidth(w){
if(!w) w=window
if(isMSIE || isOpera7) return KL_getBody(w).scrollWidth
if(isNN) return w.document.width
if(isOpera) return w.document.body.style.pixelWidth
}
function getDocumentHeight(w){
if(!w) w=window
if(isMSIE || isOpera7) return KL_getBody(w).scrollHeight
if(isNN) return w.document.height
if(isOpera) return w.document.body.style.pixelHeight
}
function getScrollX(w){
if(!w) w=window
if(isMSIE || isOpera7) return KL_getBody(w).scrollLeft
if(isNN || isOpera) return w.pageXOffset
}
function getScrollY(w){
if(!w) w=window
if(isMSIE || isOpera7) return KL_getBody(w).scrollTop
if(isNN || isOpera) return w.pageYOffset
}
function preloadImage(imageFile){
KL_imgArray[KL_imgCount]=new Image()
KL_imgArray[KL_imgCount++].src=imageFile
}
var KL_LAYER=0
var KL_IMAGE=1
function KL_findObject(what,where,type){
var i,j,l,s
var len=eval(where+".length")
for(j=0;j<len;j++){
s=where+"["+j+"].document.layers"
if(type==KL_LAYER){
l=s+"[\""+what+"\"]"
}
if(type==KL_IMAGE){
i=where+"["+j+"].document.images"
l=i+"[\""+what+"\"]"
}
if(eval(l)) return l
l=KL_findObject(what,s,type)
if(l!="null") return l
}
return "null"
}
function KL_getObjectPath(name,parent,type){
var l=((parent && isNN4)?(parent+"."):(""))+((type==KL_LAYER)?KL_layerRef:KL_imageRef)+name+((type==KL_LAYER)?KL_layerPostfix:KL_imagePostfix)
if(eval(l))return l
if(!isNN4){
return l
}else{
return KL_findObject(name,"document.layers",type)
}
}
function layer(name){
return new KLayer(name,null)
}
function layerFrom(name,parent){
if(parent.indexOf("document.")<0) parent=layer(parent).path
return new KLayer(name,parent)
}
function image(name){
return new KImage(name,null)
}
function imageFrom(name,parent){
if(parent.indexOf("document.")<0) parent=layer(parent).path
return new KImage(name,parent)
}
// class "KLayer":
function KLayer(name,parent){
this.path=KL_getObjectPath(name,parent,KL_LAYER)
this.object=eval(this.path)
if(!this.object)return
this.style=this.css=eval(this.path+KL_styleSwitch)
}
KLP=KLayer.prototype
KLP.isExist=KLP.exists=function(){
return (this.object)?true:false
}
function KL_getPageOffset(o){
var KL_left=0
var KL_top=0
do{
KL_left+=o.offsetLeft
KL_top+=o.offsetTop
}while(o=o.offsetParent)
return [KL_left, KL_top]
}
KLP.getLeft=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera) return o.offsetLeft-pageLeft
if(isNN4) return o.x-pageLeft
}
KLP.getTop=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera) return o.offsetTop-pageTop
if(isNN4) return o.y-pageTop
}
KLP.getAbsoluteLeft=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera) return KL_getPageOffset(o)[0]-pageLeft
if(isNN4) return o.pageX-pageLeft
}
KLP.getAbsoluteTop=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera) return KL_getPageOffset(o)[1]-pageTop
if(isNN4) return o.pageY-pageTop
}
KLP.getWidth=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera7) return o.offsetWidth
if(isOpera) return this.css.pixelWidth
if(isNN4) return o.document.width
}
KLP.getHeight=function(){
var o=this.object
if(isMSIE || isMozilla || isOpera7) return o.offsetHeight
if(isOpera) return this.css.pixelHeight
if(isNN4) return o.document.height
}
KLP.getZIndex=function(){ //deprecated
return this.css.zIndex
}
KLP.setLeft=KLP.moveX=function(x){
x+=pageLeft
if(isOpera){
this.css.pixelLeft=x
}else if(isNN4){
this.object.x=x
}else{
this.css.left=x+"px"
}
}
KLP.setTop=KLP.moveY=function(y){
y+=pageTop
if(isOpera){
this.css.pixelTop=y
}else if(isNN4){
this.object.y=y
}else{
this.css.top=y+"px"
}
}
KLP.moveTo=KLP.move=function(x,y){
this.setLeft(x)
this.setTop(y)
}
KLP.moveBy=function(x,y){
this.moveTo(this.getLeft()+x,this.getTop()+y)
}
KLP.setZIndex=KLP.moveZ=function(z){ //deprecated
this.css.zIndex=z
}
KLP.setVisibility=function(v){
this.css.visibility=(v)?(isNN4?"show":"visible"):(isNN4?"hide":"hidden")
}
KLP.show=function(){
this.setVisibility(true)
}
KLP.hide=function(){
this.setVisibility(false)
}
KLP.isVisible=KLP.getVisibility=function(){
return (this.css.visibility.toLowerCase().charAt(0)=='h')?false:true
}
KLP.setBgColor=function(c){
if(isMSIE || isMozilla || isOpera7){
this.css.backgroundColor=c
}else if(isOpera){
this.css.background=c
}else if(isNN4){
this.css.bgColor=c
}
}
KLP.setBgImage=function(url){
if(isMSIE || isMozilla || isOpera6){
this.css.backgroundImage="url("+url+")"
}else if(isNN4){
this.css.background.src=url
}
}
KLP.setClip=KLP.clip=function(top,right,bottom,left){
if(isMSIE || isMozilla || isOpera7){
this.css.clip="rect("+top+"px "+right+"px "+bottom+"px "+left+"px)"
}else if(isNN4){
var c=this.css.clip
c.top=top
c.right=right
c.bottom=bottom
c.left=left
}
}
KLP.scrollTo=KLP.scroll=function(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
if(scrollX>this.getWidth()-windowWidth) scrollX=this.getWidth()-windowWidth
if(scrollY>this.getHeight()-windowHeight) scrollY=this.getHeight()-windowHeight
if(scrollX<0)scrollX=0
if(scrollY<0)scrollY=0
var top=0
var right=windowWidth
var bottom=windowHeight
var left=0
left=left+scrollX
right=right+scrollX
top=top+scrollY
bottom=bottom+scrollY
this.moveTo(windowLeft-scrollX,windowTop-scrollY)
this.setClip(top,right,bottom,left)
}
KLP.scrollBy=KLP.scrollByOffset=function(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
var X=-parseInt(this.css.left)+windowLeft+scrollX
var Y=-parseInt(this.css.top)+windowTop+scrollY
this.scroll(windowLeft,windowTop,windowWidth,windowHeight,X,Y)
}
KLP.scrollByPercentage=function(windowLeft,windowTop,windowWidth,windowHeight,scrollX,scrollY){
var X=(this.getWidth()-windowWidth)*scrollX/100
var Y=(this.getHeight()-windowHeight)*scrollY/100
this.scroll(windowLeft,windowTop,windowWidth,windowHeight,X,Y)
}
KLP.write=function(str){
var o=this.object
if(isNN4){
var d=o.document
d.open()
d.write(str)
d.close()
}else{
o.innerHTML=str
}
}
KLP.add=function(str){
var o=this.object
if(isNN4){
o.document.write(str)
}else{
o.innerHTML+=str
}
}
// class "KImage":
KIP=KImage.prototype
function KImage(name){
this.path=KL_getObjectPath(name,false,KL_IMAGE)
this.object=eval(this.path)
}
KIP.isExist=KIP.exists=function(){
return (this.object)?true:false
}
KIP.getSrc=KIP.src=function(){
return this.object.src
}
KIP.setSrc=KIP.load=function(url){
this.object.src=url
}
</script>
<script>
function cancelCloseMenu(){
if(self.tm) clearTimeout(tm) // cancel delayed closing
}
function showMenu(){
if(!self.menu || !self.submenu){
menu=layer("menulayer")
submenu=layer("submenulayer")
}
cancelCloseMenu()
submenu.moveTo(menu.getAbsoluteLeft(), menu.getAbsoluteTop() + menu.getHeight()) // move second menu relatively
submenu.show()
}
function initiateHideMenu(){
tm=setTimeout("hideMenu()",1000) // 1 second delay to close a submenu
}
function hideMenu(){
submenu.hide()
}
</script>
Move mouse to this word: <span id="menulayer" style="position: relative; background-color: yellow"><a href="#" onmouseover="showMenu(); return true" onmouseout="initiateHideMenu(); return true">MENU</a></span> to open a menu.
<div id="submenulayer" style="position: absolute; visibility: hidden; background-color: #00ff00">
<a href="#" onmouseover="cancelCloseMenu(); return true" onmouseout="initiateHideMenu(); return true">item1</a><br>
<a href="#" onmouseover="cancelCloseMenu(); return true" onmouseout="initiateHideMenu(); return true">item2</a></div>
</html>
Related examples in the same category
