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;
}

var ismovedown=0;
//ismovedown = 0;

function movedown(){
ismovedown = 1;
if (iens6&&parseInt(crossobj.style.top)>=(contentheight*(-1)+250))
crossobj.style.top=parseInt(crossobj.style.top)-speed+"px";
else if (ns4&&crossobj.top>=(contentheight*(-1)+250))
crossobj.top-=speed;
movedownvar=setTimeout("movedown()",20);
}

function moveup(){
if (ismovedown == 1){
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);
}

function movetop(){
if (iens6)
crossobj.style.top=0+"px"
else if (ns4)
crossobj.top=0
}

function movebottom()
{
ismovedown = 1;
if (iens6&&parseInt(crossobj.style.top)>=(contentheight*(-1)+250))
crossobj.style.top=250-contentheight+"px";
else if (ns4&&crossobj.top>=(contentheight*(-1)+250))
crossobj.top=250-crossobj.top;
}

function getcontent_height(){
if (iens6)
contentheight=crossobj.offsetHeight;
else if (ns4)
document.nscontainer.document.nscontent.visibility="show";
}