var speed =20
            demo2.innerHTML = demo1.innerHTML
            demo.scrollLeft=demo.scrollWidth 

        
            var MyMar;
			
			shang1();
            function xia() {
                speed = 20
                clearInterval(MyMar);
                MyMar = setInterval(Marquee, speed)
                demo.onmouseover = function() { clearInterval(MyMar) }
                demo.onmouseout = function() { MyMar = setInterval(Marquee, speed) } 
        
            }
            function shang() {
                speed = 20
                clearInterval(MyMar)
                MyMar = setInterval(Marquee1, speed)
                demo.onmouseover = function() { clearInterval(MyMar) }
                demo.onmouseout = function() { MyMar = setInterval(Marquee1, speed) } 
        
            }
			 function shang1() {
                speed =20
                clearInterval(MyMar)
                MyMar = setInterval(Marquee1, speed)
                demo.onmouseover = function() { clearInterval(MyMar) }
                demo.onmouseout = function() { MyMar = setInterval(Marquee1, speed) } 
        
            }
            function jiasuxia() {
		
                speed = 1
                clearInterval(MyMar)
                MyMar = setInterval(Marquee, speed)
                demo.onmouseover = function() { clearInterval(MyMar) }
                demo.onmouseout = function() { MyMar = setInterval(Marquee, speed) } 
        
            }
            function jiasushang() {
                speed = 1
      
                clearInterval(MyMar)
                MyMar = setInterval(Marquee1, speed)
                demo.onmouseover = function() { clearInterval(MyMar) }
                demo.onmouseout = function() { MyMar = setInterval(Marquee1, speed) } 
        
            }
        
            function Marquee1() {
                if (demo2.offsetWidth - demo.scrollLeft <= 0)
                    demo.scrollLeft -= demo1.offsetWidth
                else {
                    demo.scrollLeft++
                }
            }
      
			function Marquee(){ 
if(demo.scrollLeft<=0) 
demo.scrollLeft+=demo2.offsetWidth 
else{ 
demo.scrollLeft-- 
} 
}