js script that text links appear one by one_advertising code

I found this code when browsing the website, it is very good, the height is 20, text advertisement
calling code:

Copy code The code is as follows:

var marqueeContent =new Array(); //Scrolling theme                                                                                                                                                                                                                                                                              since a>';
marqueeContent[1]='Google AdSense';
marqueeContent[2]='Firefox browser download';
marqueeContent[3]='Advertising space for rent throughout the site ';
marqueeContent[4]='Full site data download site' ;
marqueeContent[5]='Google AdSense';
marqueeContent[6]='Full site data download site';
var marqueeInterval=new Array( ); //Define some commonly used and frequently used variables
var marqueeId=0;
var marqueeDelay=4000;
var marqueeHeight=20;
function initMarquee() {
var str=marqueeContent[0];
document.write('

' str '

');
marqueeId ;
marqueeInterval[0]= setInterval("startMarquee()",marqueeDelay);
}
function startMarquee() {
var str=marqueeContent[marqueeId];
marqueeId;
if(marqueeId>=marqueeContent.length ) marqueeId=0;
if(marqueeBox.childNodes.length==1) {
var nextLine=document.createElement('DIV');
nextLine.innerHTML=str;
marqueeBox.appendChild (nextLine);
}
else {
marqueeBox.childNodes[0].innerHTML=str;
marqueeBox.appendChild(marqueeBox.childNodes[0]);
marqueeBox.scrollTop=0 ;
}
clearInterval(marqueeInterval[1]);
marqueeInterval[1]=setInterval("scrollMarquee()",10);
}
function scrollMarquee() {
marqueeBox.scrollTop;
if(marqueeBox.scrollTop%marqueeHeight==marqueeHeight){
clearInterval(marqueeInterval[1]);
}
}
initMarquee();