var posY=0;
var endY=0;
var displayH=120;
var speed=10;
var timer;

function startmove(turn){
	slideItem=document.getElementById("slideItems");
	if(!timer){
		if(turn=="up"){
			if(posY<=(slideItem.offsetHeight-displayH)*-1){
				endY=(slideItem.offsetHeight-displayH)*-1;
			}else{
				endY=posY-displayH;
			}
		}else{
			if(posY>=0){
				endY=0;
			}else{
				endY=posY+displayH;
			}
		}
		timer=setInterval("move()",1);
	}
}

function move(){
	posY+=(endY-posY)/speed;
	if(Math.abs(endY-posY)<=1){
		document.getElementById("slideItems").style.top=endY+"px";
		posY=endY;
		clearInterval(timer);
		timer=undefined;
	}else{
		document.getElementById("slideItems").style.top=posY+"px";
	}
}