// default
var posX=0;
var endX=0;
var displayW=650;
var speed=10;
var timer;

function startmove(turn, num) {
	//var offsetW = $("slideItems").offsetWidth;
	var offsetW = Math.ceil(num / 5) * displayW;
    if (!timer) {
        if (turn == "right") {
            if (posX <= (offsetW - displayW) * -1) {
                endX = (offsetW - displayW) * -1;
            } else {
                endX = posX - displayW;
            }
        } else {
            if (posX >= 0) {
                endX = 0;
            } else {
                endX = posX + displayW;
            }
        }
        timer = setInterval("move()", 1);
    }
}

function move() {
    posX += (endX - posX) / speed;
    if (Math.abs(endX - posX) <= 1) {
        $("slideItems").style.left = endX + "px";
        posX = endX;
        clearInterval(timer);
        timer = undefined;
    } else {
        $("slideItems").style.left = posX + "px";
    }
}