var scroll_handler = 0;
var scroll_dir = 0;
var scroll_2up = function(){ if(!scroll_handler) { scroll_dir=-5; scroll_handler = window.setInterval(scroll_step,60); } }
var scroll_2down = function(){ if(!scroll_handler) { scroll_dir=5; scroll_handler = window.setInterval(scroll_step,60); } }
var scroll_stop  = function(){ if(scroll_handler) { window.clearInterval(scroll_handler); scroll_handler = 0; } }
var scroll_step  = function() {
	if (!scroll_handler) return;
	var avail_height = jQuery("#scroll")[0].scrollHeight;
	var child_height = jQuery("#scroll .scroll_content")[0].scrollHeight;
	var d = jQuery("#scroll .scroll_content");
	var offset = parseInt( d.css("margin-top") );
	if (
(scroll_dir < 0 && offset < 0) ||
(scroll_dir > 0 && child_height + offset + 24 > avail_height)
   ) { d.css({ marginTop: offset - scroll_dir }); } else scroll_stop();
}
jQuery(function(){
	jQuery("#arrows #scroll_top").show();
	jQuery("#arrows #scroll_down").show();
	jQuery("#scroll .scroll_content").css({marginTop:0});
//            jQuery("#scroll_top").mousedown(function(){ jQuery("#scroll .scroll_content").css({marginTop:0}) });
	jQuery("#scroll_top").mouseup(scroll_stop).mouseout(scroll_stop).mousedown(scroll_2up);
	jQuery("#scroll_down").mouseup(scroll_stop).mouseout(scroll_stop).mousedown(scroll_2down);
});