var adRWidth=138;
 var adLWidth=1020;
 <!-- ===================== Khoi tao ham de hien thi Hinh anh Quang cao phia ben Phai trang chu ============================= --> 
  function FloatTopDivRight()
   {
    startX = document.body.clientWidth - adRWidth, startY =10;
    var ns = (navigator.appName.indexOf("Netscape") != -1);
    var d = document;
    if (document.body.clientWidth <=1024) startX = -adRWidth;
     function ml(id)
      {
       var el=d.getElementById?d.getElementById(id):d.all?d.all[id]:d.layers[id];
       if(d.layers)el.style=el;
       el.sP=function(x,y){this.style.left=x;this.style.top=y;};
       el.x = startX;
       el.y = startY;
       return el;
      }
     window.stayTopRight=function()
      {
       if (document.documentElement && document.documentElement.scrollTop)
        var pY = ns ? pageYOffset : document.documentElement.scrollTop;
       else if (document.body)
         var pY = ns ? pageYOffset : document.body.scrollTop;
       if (document.body.scrollTop > 10){startY = 3} 
       else 
        {startY = 1};
       ftlObj.y += (pY + startY - ftlObj.y)/32;
       ftlObj.sP(ftlObj.x, ftlObj.y);
       setTimeout("stayTopRight()", 1);
      }
     ftlObj = ml("divAdRight");
     stayTopRight();
   }
 <!-- ======================================================================================================================= -->          
 <!-- ===================== Khoi tao ham de hien thi Hinh anh Quang cao phia ben Trai trang chu ============================= --> 
  function FloatTopDivLeft()
   {
    startX2 = document.body.clientWidth - adLWidth, startY2 = 10;
    var ns2 = (navigator.appName.indexOf("Netscape") != -1);
    var d2 = document;
    if (document.body.clientWidth <= 1024) startX2 = -adLWidth;
     function ml2(id)
      {
       var el2=d2.getElementById?d2.getElementById(id):d2.all?d2.all[id]:d2.layers[id];
       if(d2.layers)el2.style=el2;
       el2.sP=function(x,y){this.style.left=x;this.style.top=y;};
       el2.x = startX2;
       el2.y = startY2;
       return el2;
      }
     window.stayTopLeft=function()
      {
       if (document.body.clientWidth <= 1024)
        {
         ftlObj2.x = - 115;ftlObj2.y = 0;        ftlObj2.sP(ftlObj2.x, ftlObj2.y);
        }
       else
        {
         if (document.documentElement && document.documentElement.scrollTop)
          var pY2 = ns2 ? pageYOffset : document.documentElement.scrollTop;
         else if (document.body)
          var pY2 = ns2 ? pageYOffset : document.body.scrollTop;
         if (document.body.scrollTop > 1){startY2 = 3} 
         else 
          {startY2 =1};
         if (document.body.clientWidth >= 1024)
          {
           ftlObj2.x = 0;ftlObj2.y += (pY2 + startY2 - ftlObj2.y)/32;        ftlObj2.sP(ftlObj2.x, ftlObj2.y);
          }
         else
          {
           ftlObj2.x = startX2;
           ftlObj2.y += (pY2 + startY2 - ftlObj2.y)/32;
           ftlObj2.sP(ftlObj2.x, ftlObj2.y);
          }
       }
      setTimeout("stayTopLeft()", 1);
     }
    ftlObj2 = ml2("divAdLeft");
    stayTopLeft();
  }
 <!-- ======================================================================================================================= -->                  
 <!-- ===================== Khoi tao ham de cho phep hien thi Hinh anh Quang cao phia ben Phai trang chu ==================== --> 
  function ShowAdDivRight()
   {
    var objAdDivRight = document.getElementById("divAdRight");
    if (document.body.clientWidth <=1024)
     {
      objAdDivRight.style.left = - adLWidth;
     }
    else
     {
      objAdDivRight.style.left = 0;
     }
    FloatTopDivRight();
   }
 <!-- ======================================================================================================================= -->          
 <!-- ===================== Khoi tao ham de cho phep hien thi Hinh anh Quang cao phia ben Trai trang chu ==================== --> 
 function ShowAdDivLeft()
  {
   var objAdDivLeft = document.getElementById("divAdLeft");
   if (document.body.clientWidth <=1024)
    {
     objAdDivLeft.style.left = - adLWidth;
    }
   else
    {
     objAdDivLeft.style.left = document.body.clientWidth - adRWidth;
    }
   FloatTopDivLeft();
  }
 <!-- ======================================================================================================================= -->