div image marquee seamless connection implementation code_HTML/Xhtml_web page production

<script> <br><!-- <br />var speed=10; //The larger the number, the slower the speed <br />var tab=document.getElementById("demo"); <br />var tab1=document.getElementById("demo1"); <br />var tab2=document.getElementById("demo2"); <br />tab2.innerHTML=tab1.innerHTML; <br />function Marquee(){ <br />if( tab2.offsetWidth-tab.scrollLeft<=0) <br />tab.scrollLeft-=tab1.offsetWidth <br />else{ <br />tab.scrollLeft ; <br />} <br />} <br />var MyMar=setInterval( Marquee,speed); <br />tab.onmouseover=function() {clearInterval(MyMar)}; <br />tab.onmouseout=function() {MyMar=setInterval(Marquee,speed)}; <br />--> <br></script>