var speedLeft=40;//speed
var tab=document.getElementById("demo_marqueeLeft");
var tab1=document.getElementById("demo1_marqueeLeft");
var tab2=document.getElementById("demo2_marqueeLeft");
tab2.innerHTML=tab1.innerHTML;
function MarqueeLeft()
{
	if(tab2.offsetWidth-tab.scrollLeft<=0)
	{
		tab.scrollLeft-=tab1.offsetWidth;
	}
	else
	{
		tab.scrollLeft++;
	}
}
var MyMarLeft=setInterval(MarqueeLeft,speedLeft);
tab.onmouseover=function() {clearInterval(MyMarLeft)};
tab.onmouseout=function() {MyMarLeft=setInterval(MarqueeLeft,speedLeft)};