var scrollDown;
var scrollUp;

__onloadStack.push(function() {
	$('up').onmouseover = function() {clearInterval(scrollUp);clearInterval(scrollDown);scrollUp=setInterval('moveUp()',20)} ;  
	$('up').onmouseout = function() {clearInterval(scrollUp);clearInterval(scrollDown); } ;  
	$('down').onmouseover = function() {clearInterval(scrollDown);clearInterval(scrollUp);scrollDown=setInterval('moveDown()',20)} ; 
	$('down').onmouseout = function() {clearInterval(scrollDown);clearInterval(scrollUp);} ; 
	if($('content').scrollHeight > $('content').offsetHeight) {
		$('scrollBar').style.visibility = 'visible';
	}
});

function moveUp() {
	if($('content').scrollTop > 0) {
		$('content').scrollTop -= 5;
	} else {
	clearInterval(scrollUp);
	}
}

function moveDown() {
	if(($('content').scrollTop+$('content').offsetHeight) < $('content').scrollHeight) {
		$('content').scrollTop += 5;
	} else {
		clearInterval(scrollDown);
	}
}