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Menù multiplo a comparsa

Questo Javascript genera un buon menu a comparsa con un buon effetto visivo e altamente personalizzabile.

<html>
<head>
<title>Menù multiplo a comparsa</title>
<style>
TD{font-family:arial,helvetica; font-size:10pt}
body{background-color:white}
A{color:Navy; text-decoration:none}
A:hover{color:red}
A:visited:{color:#808080}
DIV{font-family:arial,helvetica; font-size:12pt; font-weight:bold}
</style>
<script>
/********************************************************************************
This script is made by and copyrighted to Thomas Brattli at www.bratta.com
Visit for more great scripts. 
This may be used freely as long as this msg is intact!
********************************************************************************
Browsercheck:*/
ie=document.all?1:0
n=document.layers?1:0

//These are the variables you have to set:

//How many pixels should it move every step? 
var move=10;

//At what speed (in milliseconds, lower value is more speed)
menuSpeed=40

//Do you want it to move with the page if the user scroll the page?
var moveOnScroll=true

/********************************************************************************
You should't have to change anything below this.
(except in the init function to set how many menus and such.)
********************************************************************************/
//Defining variables
var tim;

//Object constructor
function makeMenu(obj,nest,lshow){
    nest=(!nest) ? '':'document.'+nest+'.'
    this.css=(n) ? eval(nest+'document.'+obj):eval(obj+'.style')					
	this.state=1
	this.go=0
	this.lshow=lshow
	this.up=m_up;
	this.down=m_down;
	this.menu=m_menu;
	this.tim
	this.height=n?this.css.document.height:eval(obj+'.offsetHeight')
	this.top=b_gettop
    this.obj = obj + "Object"; 	eval(this.obj + "=this")	
}
//Get's the top position.
function b_gettop(){
	var gleft=(n) ? eval(this.css.top):eval(this.css.pixelTop);
	return gleft;
}
/********************************************************************************
Deciding what way to move the menu (this is called onmouseover, onmouseout or onclick)
********************************************************************************/
function m_menu(){
	if(!this.state){
		clearTimeout(this.tim)
		this.up()	
	}else{
		clearTimeout(this.tim)
		this.down()
	}
	}
//Menu in
function m_up(){
	if(this.top()>eval(scrolled)-this.height+this.lshow){
		this.go=1
		this.css.top=this.top()-move
		this.tim=setTimeout(this.obj+".up()",menuSpeed)
	}else{
		this.go=0
		this.state=1
	}	
}
//Menu out
function m_down(){
	if(this.top()<eval(scrolled)){
		this.go=1
		this.css.top=this.top()+move
		this.tim=setTimeout(this.obj+".down()",menuSpeed)
	}else{
		this.go=0
		this.state=0
	}	
}
/********************************************************************************
Checking if the page is scrolled, if it is move the menu after
********************************************************************************/
function checkScrolled(){
	for(i=0;i<oMenu.length;i++){
		if(!oMenu[i].go)oMenu[i].css.top=(!oMenu[i].state)?eval(scrolled):eval(scrolled)-oMenu[i].height+oMenu[i].lshow
		}
	if(n) setTimeout('checkScrolled()',30)
}
/********************************************************************************
Inits the page, makes the menu objects, moves it to the right place, 
show it..Make as many as you want but remember that they take some
prosessor power in netscape if you have the moveOnScroll on.
The last parameter in makeMenu call is how much 
of the manu you want visible when it's in it's up state.
********************************************************************************/
function menuInit(){
	oMenu=new Array()
	oMenu[0]=new makeMenu('divMenu','',20)
	oMenu[1]=new makeMenu('divMenu1','',20)
	oMenu[2]=new makeMenu('divMenu2','',20)
	oMenu[3]=new makeMenu('divMenu3','',20)
	scrolled=n?"window.pageYOffset":"document.body.scrollTop"
	for(i=0;i<oMenu.length;i++){
		oMenu[i].css.top=eval(scrolled)-oMenu[i].height+oMenu[i].lshow
		oMenu[i].css.visibility='visible'
	}
	if(moveOnScroll) ie?window.onscroll=checkScrolled:checkScrolled();
}

//Initing menu on pageload
onload=menuInit;
</script>
</head>

Compatibilità: MsIE | Netscape

Javascript

Altre risorse:
Libri Javascript | Manuale Javascript

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