function ScrollBy(dir){
        var left = xdiv.scrollLeft;
        if (dir =='left')
           xdiv.scrollLeft = left - 30;
        else
           xdiv.scrollLeft = left + 30; 
   }
   
   function scrollTicker (){	
		elm = document.getElementById('xdiv');
		limit = elm.scrollLeft +  100;
		
		var scroll = function(){
			if ( ( elm.scrollLeft<=limit ) && ( elm.scrollLeft < (elm.scrollWidth-elm.offsetWidth))  ) {
				elm.scrollLeft = elm.scrollLeft + 10;		
				derecha=setTimeout("scrollTicker()",40);
			}
		}
		scroll();
	}
	
	function scrollTickerLeft (){	
		elm = document.getElementById('xdiv');
		limit = elm.scrollLeft;
		/*alert(limit);
		alert(elm.scrollLeft);
		alert(elm.scrollWidth-elm.offsetWidth);*/
		
		var scroll = function(){
			if ( ( elm.scrollLeft<=limit ) && ( elm.scrollLeft <= (elm.scrollWidth-elm.offsetWidth))  ) {
				elm.scrollLeft = elm.scrollLeft - 10;		
				izquierda=setTimeout("scrollTickerLeft()",40);
			}
		}
		scroll();
	}