//######　画像スライド ##########

//初期設定
var posX=0; //現在の座標
var endX=0; //スライド終了座標
var displayW=630; //1画面分の幅
var displayN =6; //1画面分の個数
var speed=6; //少ないほど早い
var timer;

//スライド開始用
//
function startmove(turn,item_num){
	if(isNaN(item_num)) {
		item_num = displayN;
	}
	slideItem=document.getElementById("slideItems");
	hiddenWidth = displayW*Math.ceil(item_num/displayN);
	if(!timer){
		if(turn=="right"){
			if(posX<=(hiddenWidth-displayW)*-1){
				endX=0;
			}else{
				endX=posX-displayW;
			}
		}else if(turn=="re"){
			if(posX>=0){
				endX=0;
				}else{
					endX=0;
				}		
		}else{
			if(posX>=0){
				endX=(hiddenWidth-displayW)*-1;
				}else{
					endX=posX+displayW;
				}
		}
		timer=setInterval("move()",1);
	}
}
	


//スライド動作用
function move(){
	posX+=(endX-posX)/speed;
	if(Math.abs(endX-posX)<=1){
		document.getElementById("slideItems").style.left=endX+"px";
		posX=endX;
		clearInterval(timer);
		timer=undefined;
	}else{
		document.getElementById("slideItems").style.left=posX+"px";
	}	
}