var setSpeed=80;
var timer;
var getDiv = document.getElementById("getDiv");

var showImgloop= document.getElementById("showImgloop");
showImgloop.innerHTML=document.getElementById("showImg").innerHTML;

//getDiv.scrollTop = 0;	//指定一開始的位置(case:1時)
function picMarquee(mType){
	switch(mType)
	{
		case 1:	//跑馬燈由上往下
			if(showImgloop.offsetHeight - getDiv.scrollTop >= 800){
				getDiv.scrollTop = 800;
			}else{
				getDiv.scrollTop--;
			}
			break;
				
		case 2:	//跑馬燈由下往上
			if(showImgloop.offsetHeight - getDiv.scrollTop <= 0){
				getDiv.scrollTop = 0;
			}else{
				getDiv.scrollTop++;
			}
			break;		
		
		case 3://由右往左
			if(showImgloop.offsetWidth - getDiv.scrollLeft <= 0){
				getDiv.scrollLeft = 0;
			}else{
				getDiv.scrollLeft++;
			}
			break;
	}
}