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if (iens6) {

          var crossobj=document.getElementById? document.getElementById(\"content\") : document.all.content

           var contentheight=crossobj.offsetHeight

      } else if (ns4) {

       var crossobj=document.nscontainer.document.nscontent

       var contentheight=crossobj.clip.height

        }

function movedown()
if (iens6 && parseInt(crossobj.style.top) >= (contentheight*(-1)+100)) {
crossobj.style.top = parseInt(crossobj.style.top) - speed + \"px\"
} else if (ns4 && crossobj.top >= (contentheight * (-1) + 100)) {
crossobj.top -= speed
}
movedownvar = setTimeout(\"movedown()\",20)
}

function moveup() {
if (iens6 && parseInt(crossobj.style.top) <= 0) {
crossobj.style.top=parseInt(crossobj.style.top) + speed + \"px\"
} else if (ns4 && crossobj.top <= 0) {
crossobj.top += speed
} moveupvar=setTimeout(\"moveup()\",20)
}