scroll veeticale 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 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[/u) for script

//ENTER CONTENT TO SCROLL BELOW.
var content='<p>Visit <a href="http://www.javascriptkit.com">JavaScript Kit</a> for JavaScript tutorials and over 400 <font color="#FF0000">free</font> scripts</p><p><a href="http://freewarejava.com">Freewarejava.com</a>- direct links to Java applets and resources</p><p>Stay up to date on current news and events. Visit <a href="http://www.msnbc.com">MSNBC.com</a></p><p><a href="http://www.dynamicdrive.com">Dynamic Drive</a> 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:false;
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):parseInt(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

 

[criric]

Ciao,
considerando che si ferma a verificare la versione di IE 5 deve essere molto vecchio come script ( non l'ho letto tutto)

var ie5=(document.all && w3c)?true:false;

io provereri qualcosa con jquery

<!DOCTYPE html>
<html>
    <head>
        <title></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
        <script type="text/javascript">
            $(document).ready(function(){
                function scorri() {
                    $("#testo").css("top","200px");
                    $("#testo").animate({top:"-" + $("#testo").height()}, 5000, function(){
                        scorri();
                    });
                }
                scorri();
            })
        </script>
        <style type="text/css">
            #contenitore,#contenitore1 {
                width: 220px;
                height: 200px;
                border: 3px outset red;
                overflow: hidden;
            }
            #testo,#testo1 {               
                position:relative;
                text-align: center;
            }
        </style>
    </head>
    <body>
        <div id="contenitore">
            <div id="testo">
                MrWebMaster lol
            </div>
        </div>
    </body>
</html>

non l'ho testato per bene