function getStyleObj(id){
var obj = null;
if(document.getElementById){
obj = document.getElementById(id);
}else if(document.all){
obj = document.all[id];
}else if(document.layers){
obj = document.layers[id];
}
return (obj && obj.style) || obj;
}


function centerDiv(id, divwidth) {

if (document.layers) {
    var width = window.innerWidth;
    var obj = getStyleObj(id)
        left = ((width-divwidth)/2)>0 ? ((width-divwidth)/2):0
    obj.left = left;
} 
else if (document.all || document.getElementById) {
    var width = document.body.clientWidth;    
    var obj = document.getElementById(id)   
    left = ((width-divwidth)/2)>0 ? ((width-divwidth)/2):0
    obj.style.left =  left;
}
}


var t=null;

function scroll(theelement, distance) {
  if (!t) {  	                                           
    var element=document.getElementById(theelement);    
    var startheight=element.scrollLeft;                  
    var endheight=element.scrollLeft+distance;           
    if (endheight < 0) endheight=0;                     
    scroller(theelement, startheight, endheight, 42, 3);
  } 
} 

function scroller(theelement, startheight, endheight,
  maxspeed, softness) {
  var el=document.getElementById(theelement);             
  if (el.scrollLeft != endheight) {                    
    var distanceend=Math.abs((endheight -             
      el.scrollLeft) / softness);
    var distancestart=Math.abs((startheight           
      - el.scrollLeft) / softness);                    
    var distance=Math.min(distancestart, distanceend);
    var multiplier;
    if (distance<1) multiplier=Math.abs(distance-1)+1;
    else multiplier=1;
    distance=Math.ceil(distance);                     
    if (distance==0) distance=1;                      
    if (distance>maxspeed) distance=maxspeed;         
    if (startheight > endheight) distance=-distance;  
    var tempscrollLeft=el.scrollLeft;                  
    el.scrollLeft+=distance;                          
    if (tempscrollLeft+distance==el.scrollLeft)        
      t=setTimeout('scroller(\''+theelement+'\','+    
      startheight+','+endheight+','+maxspeed+','+
      softness+')',Math.round(20 * multiplier));
    else
      t=null;                                         
  } else t=null;                                      
}