function getYPosition(){
  if(window.scrollY) return window.scrollY;
  if(window.pageYOffset) return window.pageYOffset;
  if(document.documentElement && document.documentElement.scrollTop){
   return document.documentElement.scrollTop;
  }
  else if(document.body && document.body.scrollTop){
   return document.body.scrollTop;
  }
  return 0;
}

var speed = 1;
var moveDown = 50;
var moveUp = -50;
var presentY = 0;

function scrollDown(targetY){
presentY = getYPosition();
	if(targetY > presentY){
		window.scrollBy(0,moveDown);
		var rep = setTimeout("scrollDown("+targetY+")", speed);
	}
	if(targetY <= presentY){
		clearTimeout(rep);
		scrollTo(0,targetY);
		moveDown = 30;
	}
	else{
		relate = targetY-presentY;
		if(relate <= 150){
			moveDown = moveDown*0.8; 
			if(moveDown <= 1){
				moveDown = 1;
			}
		}
	}
}


function scrollUp(targetY){
presentY = getYPosition();
	if(targetY < presentY){
		window.scrollBy(0,moveUp);
		var rep = setTimeout("scrollUp("+targetY+")", speed);
	}
	if(targetY >= presentY){
		clearTimeout(rep);
		scrollTo(0,targetY);
		moveUp = -30;
	}
	else{
		relate = presentY-targetY;
		if(relate <= 150){
			moveUp = moveUp*0.8; 
			if(moveUp >= -1){
				moveUp = -1;
			}
		}
	}
}

var cont10 = 0;
var cont11 = 720;
var cont12 = 1420;

var cont20 = 0;
var cont21 = 720;
var cont22 = 1420;
var cont23 = 2120;
var cont24 = 2820;

var cont30 = 0;