var scrollID;
var	sc_speed = 1.5;//default 3
var sc_interval = 40;
function scroll() {
	position = getPosition();
	toY = position[1]/sc_speed;
	toX = position[0]/sc_speed;
	if(toY < 3){
		window.scrollTo(0,0);
		clearInterval(scrollID);
	}else{
		window.scrollTo(toX,toY);
		scrollID = setTimeout(scroll,sc_interval);
	}
}
function getPosition(){
	var x1 = x2 = x3 = 0;
	var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
	return Array(x,y);
}

$(document).ready(function(){
	$("a",$("#topHe")).attr("href","javascript:scroll()");
});