var cont = document.getElementById ('content1')

function movedown(no_timeout)
{
//	obj=document.getElementById? document.getElementById(content_id) : document.all.content;
	obj = cont
	contentheight=obj.offsetHeight;

	if (parseInt(obj.style.top)>=(contentheight*(-1)+670))
		obj.style.top=parseInt(obj.style.top)-32+"px";

	if (!no_timeout) {
		movedownvar=setTimeout("movedown()", 20);
	} else {
		movedownvar = null;
	}
}

function moveup(no_timeout)
{
	//	obj=document.getElementById? document.getElementById(content_id) : document.all.content;
	obj = cont
	contentheight=obj.offsetHeight;

	if (parseInt(obj.style.top)<=0)
		obj.style.top=parseInt(obj.style.top)+32+"px";

	if (!no_timeout) {
		moveupvar=setTimeout("moveup()", 20);
	} else {
		moveupvar = null;
	}
}


function handle(delta) {
	if (delta > 0)
            moveup (true);
        else
            movedown (true);
}

function wheel(event){
        var delta = 0;
        if (!event) /* For IE. */
                event = window.event;
        if (event.wheelDelta) { /* IE/Opera. */
                delta = event.wheelDelta/120;
                if (window.opera)
                        delta = -delta;
        } else if (event.detail) { /** Mozilla case. */
                delta = -event.detail/3;
        }
        if (delta)
                handle(delta);
        if (event.preventDefault)
                event.preventDefault();
    event.returnValue = false;
}

var mousewheelevt=(/Firefox/i.test(navigator.userAgent))? "DOMMouseScroll" : "mousewheel"

if (cont.attachEvent)
    cont.attachEvent ('on'+mousewheelevt, wheel)
else if (cont.addEventListener)
    cont.addEventListener(mousewheelevt, wheel, false)