// JScript 文件


var js_F = document.getElementById("divImgChange");
//var imgList = ["../../SubjectImages/1.jpg", "../../SubjectImages/2.jpg", "../../SubjectImages/3.jpg","../../SubjectImages/4.jpg", "../../SubjectImages/5.jpg", "../../SubjectImages/6.jpg", "../../SubjectImages/7.jpg"];
var imgTemp = new Array();
for (i=0; i<imgList.length; i++){
	imgTemp[i] = new Image();
	imgTemp[i].src = imgList[i];
}
var imgs = new Array();
var imgID = 0, nextImgID, proveImgID;
var tf = true; //图片移动方向标志
var speed1 = 10; speed2 = 3000; //速度
function imgInit(){
	var content = '';
	for (i=0; i<imgList.length; i++){
		content += '<a href="'+ urlList[i] + '"><img alt="' + titleList[i] + '" src="' + imgList[i] + '" style="left:0;" /></a>\n';
	}
	js_F.innerHTML = content;
	imgs = js_F.getElementsByTagName('img');
	imgs[0].style.zIndex = 20;
	imgs[1].style.zIndex = 15;
}
function imgChange(){
	if ((imgID+1)<imgList.length){
		nextImgID = imgID + 1;
	} else if (imgID<imgList.length) {
		nextImgID = 0;
	} else {
		imgID = 0;
		nextImgID = imgID + 1;
	}
	imgs[imgID].style.zIndex = 20;
	imgs[nextImgID].style.zIndex = 15;
	setTimeout('imgShow()',speed2);
}
function imgShow(){
	if (tf){ //imgID向左边移动2/3，nextImgID向右边1/3
		if (parseInt(imgs[imgID].style.left)>-180){
			imgs[imgID].style.left = (parseInt(imgs[imgID].style.left)-10) + 'px';
			imgs[nextImgID].style.left = (parseInt(imgs[nextImgID].style.left)+5) + 'px';
			setTimeout('imgShow()',speed1);
		} else {
			tf = !tf;
			imgs[imgID].style.zIndex = 15;
			imgs[nextImgID].style.zIndex = 20;
			setTimeout('imgShow()',speed1);
		}
	} else {
		if (parseInt(imgs[imgID].style.left)<0){
			imgs[imgID].style.left = (parseInt(imgs[imgID].style.left)+10) + 'px';
			imgs[nextImgID].style.left = (parseInt(imgs[nextImgID].style.left)-5) + 'px';
			setTimeout('imgShow()',speed1);
		} else {
			imgs[imgID].style.zIndex = 10;
			tf = !tf;
			imgID++;
			imgChange();
		}
	}
}
imgInit();
imgChange();