var goto_top_type = -1;
var goto_top_itv = 0;
function goto_top_timer()
{
	var y = goto_top_type == 1 ? document.documentElement.scrollTop : document.body.scrollTop;
	var moveby = 35;
	y -= Math.ceil(y * moveby / 300);
	if (y < 0) {
	y = 0;
	}
	if (goto_top_type == 1) {
	document.documentElement.scrollTop = y;
	}
	else {
	document.body.scrollTop = y;
	}
	if (y == 0) {
	clearInterval(goto_top_itv);
	goto_top_itv = 0;
	}
}

function goto_top()
	{
	if (goto_top_itv == 0) {
		if (document.documentElement && document.documentElement.scrollTop) {
		goto_top_type = 1;
		}
		else if (document.body && document.body.scrollTop) {
		goto_top_type = 2;
		}
		else {
		goto_top_type = 0;
		}
		
		if (goto_top_type > 0) {
		goto_top_itv = setInterval('goto_top_timer()', 25);
		}
		}
	}