if (iens6){
var crossobj=document.getElementById? document.getElementById("contentscroll") : document.all.CtlContent;
var contentheight=crossobj.scrollHeight;
}
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)
    
    //alert (contentheight);
    //alert(getcontent_height2());
}

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)
}

function getcontent_height(){
if (iens6)
    contentheight=crossobj.scrollHeight
else if (ns4)
    document.nscontainer.document.nscontent.visibility="show"
}
if (navigator.userAgent.indexOf("Firefox")!=-1) {
    contentheight = 5000;
} else {
    window.onload=getcontent_height;
}

function testScrollerHeight() {
    var elemTest = document.getElementById? document.getElementById("contentscroll") : document.all.CtlContent;
    alert(elemTest.offsetHeight);
    alert(elemTest.scrollHeight);
    alert(elemTest.style.pixelHeight);
    alert(contentheight);
}