scroll verticale di un testo

[pe51166]

ciao a tutti, premetto l'ignoranza quasi totale di Javascript.
STo cercando per il mio sito www.sentierando.it di creare un effetto di scroll verticale all'interno di una cella di tabella.
Girando in rete ho trovato (su quseto sito!) uno script che riporto qui



//Vertical Scroller v1.2- by Brian of www.ScriptAsylum.com
//Updated for bug fixes
//Visit JavaScript Kit (http://javascriptkit.com) for script

//ENTER CONTENT TO SCROLL BELOW.
var content='

Visit JavaScript Kit for JavaScript tutorials and over 400 <font color="#FF0000">free</font> scripts</p>

Freewarejava.com- direct links to Java applets and resources</p>

Stay up to date on current news and events. Visit MSNBC.com</p>

Dynamic Drive is your definitive source for DHTML scripts and components.</p>';

var boxheight=150; // BACKGROUND BOX HEIGHT IN PIXELS.
var boxwidth=150; // BACKGROUND BOX WIDTH IN PIXELS.
var boxcolor="#FFF6e9"; // BACKGROUND BOX COLOR.
var speed=50; // SPEED OF SCROLL IN MILLISECONDS (1 SECOND=1000 MILLISECONDS)..
var pixelstep=2; // PIXELS "STEPS" PER REPITITION.
var godown=false; // TOP TO BOTTOM=TRUE , BOTTOM TO TOP=FALSE

// DO NOT EDIT BEYOND THIS POINT

var outer,inner,elementheight,ref,refX,refY;
var w3c=(document.getElementById)?true:false;
var ns4=(document.layers)?true:false;
var ie4=(document.all && !w3c)?true:false;
var ie5=(document.all && w3c)?true:false;
var ns6=(w3c && navigator.appName.indexOf("Netscape")>=0)?true:fal se;
var txt='';
if(ns4){
txt+='<table cellpadding=0 cellspacing=0 border=0 height='+boxheight+' width='+boxwidth+'><tr><td>';
txt+='<ilayer name="ref" bgcolor="'+boxcolor+'" width='+boxwidth+' height='+boxheight+'></ilayer>';
txt+='</td></tr></table>'
txt+='<layer name="outer" bgcolor="'+boxcolor+'" visibility="hidden" width='+boxwidth+' height='+boxheight+'>';
txt+='<layer name="inner" width='+(boxwidth-4)+' height='+(boxheight-4)+' visibility="hidden" left="2" top="2" >'+content+'</layer>';
txt+='</layer>';
}else{
txt+='<div id="ref" style="position:relative; width:'+boxwidth+'; height:'+boxheight+'; background-color:'+boxcolor+';" ></div>';
txt+='<div id="outer" style="position:absolute; width:'+boxwidth+'; height:'+boxheight+'; visibility:hidden; background-color:'+boxcolor+'; overflow:hidden" >';
txt+='<div id="inner" style="position:absolute; visibility:visible; left:2px; top:2px; width:'+(boxwidth-4)+'; overflow:hidden; cursor:default;">'+content+'</div>';
txt+='</div>';
}
document.write(txt);

function getElHeight(el){
if(ns4)return (el.document.height)? el.document.height : el.clip.bottom-el.clip.top;
else if(ie4||ie5)return (el.style.height)? el.style.height : el.clientHeight;
else return (el.style.height)? parseInt(el.style.height)arseInt(el.offsetHeight);
}

function getPageLeft(el){
var x;
if(ns4)return el.pageX;
if(ie4||w3c){
x = 0;
while(el.offsetParent!=null){
x+=el.offsetLeft;
el=el.offsetParent;
}
x+=el.offsetLeft;
return x;
}}

function getPageTop(el){
var y;
if(ns4)return el.pageY;
if(ie4||w3c){
y=0;
while(el.offsetParent!=null){
y+=el.offsetTop;
el=el.offsetParent;
}
y+=el.offsetTop;
return y;
}}

function scrollbox(){
if(ns4){
inner.top+=(godown)? pixelstep: -pixelstep;
if(godown){
if(inner.top>boxheight)inner.top=-elementheight;
}else{
if(inner.top<2-elementheight)inner.top=boxheight+2;
}}else{
inner.style.top=parseInt(inner.style.top)+((godown )? pixelstep: -pixelstep)+'px';
if(godown){
if(parseInt(inner.style.top)>boxheight)inner.style .top=-elementheight+'px';
}else{
if(parseInt(inner.style.top)<2-elementheight)inner.style.top=boxheight+2+'px';
}}}

window.onresize=function(){
if(ns4)setTimeout('history.go(0)', 400);
else{
outer.style.left=getPageLeft(ref)+'px';
outer.style.top=getPageTop(ref)+'px';
}}

window.onload=function(){
outer=(ns4)?document.layers['outer']ie4)?document.all['outer']:document.getElementById('outer');
inner=(ns4)?outer.document.layers['inner']ie4)?document.all['inner']:document.getElementById('inner');
ref=(ns4)?document.layers['ref']ie4)?document.all['ref']:document.getElementById('ref');
elementheight=getElHeight(inner);
if(ns4){
outer.moveTo(getPageLeft(ref),getPageTop(ref));
outer.clip.width=boxwidth;
outer.clip.height=boxheight;
inner.top=(godown)? -elementheight : boxheight-2;
inner.clip.width=boxwidth-4;
inner.clip.height=elementheight;
outer.visibility="show";
inner.visibility="show";
}else{
outer.style.left=getPageLeft(ref)+'px';
outer.style.top=getPageTop(ref)+'px';
inner.style.top=((godown)? -elementheight : boxheight)+'px';
inner.style.clip='rect(0px, '+(boxwidth-4)+'px, '+(elementheight)+'px, 0px)';
outer.style.visibility="visible";
}
setInterval('scrollbox()',speed);
}


quello che non capisco è perchè non mi funziona se metto la dichiarativa <!DOCTYPE html> mentre se metto solo <html> funziona.

Qualcuno sa/può aiutarmi?

Grazie


Paolo

p.s.
se volete vedere cosa intendo fare guardate http://www.sentierando.it/index_2.php la cella tutta a sinistra

[m4rko80]

Ciao, forse se provi con un plugin jquery sarebbe piu' facile da implementare qui

[pe51166]

grazie per la risposta ma, passami l'ignoranza, nello scrpt che mi hai indicato il testo che scrolla è all'interno di un tag DIV a me servirebbe all'interno di un tag TD

e poi hai qualche idea del perchè lo script con la dichiarativa di HTML5 non funziona?


Paolo