向左滚动文字js代码效果_javascript技巧



代码如下:





var tc;
window.onload=function(){
var o=document.getElementById('infozone');hscroll(o);
window.setInterval(function(){window.clearTimeout(tc);o.firstChild.style.marginLeft='0px';scrollup(o,20,0);},10000);
}
function scrollup(o,d,c){
if(d==c){
var t=o.firstChild.cloneNode(true);
o.removeChild(o.firstChild);o.appendChild(t);
t.style.marginTop=o.firstChild.style.marginTop='0px';
hscroll(o);
}
else{
ch=false;var s=3,c=c+s,l=(c>=d?c-d:0);
o.firstChild.style.marginTop=-c+l+'px';
window.setTimeout(function(){scrollup(o,d,c-l)},50);
}
}

function hscroll(o){
var w1=o.firstChild.offsetWidth,w2=o.offsetWidth;
if(w1<=w2)return;
tc=window.setTimeout(function(){hs(o,w1-w2,0,w1-w2)},3500);
}

function hs(o,d,c,p){
c++;var t=(c>0?-c:c);o.firstChild.style.marginLeft=t+'px';
if(c==d){if(d==0){tc=window.setTimeout(function(){hs(o,p,0,p)},2500);}else tc=window.setTimeout(function(){hs(o,0,-p,p)},3500);}
else tc=window.setTimeout(function(){hs(o,d,c,p)},5);
}

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