function SetAlpha(){
if(document.all){
if(oi.filters && oi.filters.Alpha) oi.filters.Alpha.opacity = opacity;
}else{
oi.style.MozOpacity = ((opacity >= 100)? 99:opacity) / 100;
}
}
function ImgSwitch(id, p){
if(p){
pause = true;
opacity = 100;
SetAlpha();
}
oi.src = imgs[id].src;
document.getElementById("dlink").href = links[id];
document.getElementById("it" + lastid).className = "off";
document.getElementById("it" + id).className = "on";
document.getElementById("titnv").innerHTML = "<b>" + tits[id] + "</b>";
curid = lastid = id;
}
function ScrollImg(){
if(pause && opacity >= 100) return;
if(sw == 0){
opacity += 2;
if(opacity > delay){ opacity = 100; sw = 1; }
}
if(sw == 1){
opacity -= 3;
if(opacity < 10){ opacity = 10; sw = 3; }
}
SetAlpha();
if(sw != 3) {return;}
sw = 0;
curid++;
//修改点2：这里的4也是个数
if(curid >2) {curid = 1;}
ImgSwitch(curid, false);
}
function Pause(s){
pause = s;
}
function StartScroll(){
setInterval(ScrollImg, speed);
}
function CheckLoad(){
if (imgs[1].complete == true && imgs[2].complete == true) {
clearInterval(checkid);
setTimeout(StartScroll, 2000);
}
}

var links = new Array();
links[1] = "index_second_1.php?first_model_id=105&second_model_id=&id=46";
links[2] = "#";
//links[3] = "#";
//links[4] = "#";
//links[5] = "#";
//links[6] = "#";
//links[7] = "#";
var imgs = new Array();
for(var n = 1; n <= 2; n++){ imgs[n] = new Image();}
imgs[1].src = "images/bg_4_1.gif";
imgs[2].src = "images/bg_4_2.gif";
//imgs[3].src = "images/bg_4_3.gif";
//imgs[4].src = "images/bg_4_4.gif";
//imgs[5].src = "images/bg_4_5.gif";
//imgs[6].src = "images/bg_4_6.gif";
//imgs[7].src = "images/bg_4_7.gif";
var tits = new Array();
tits[1] ="";
tits[2] = "";
//tits[3] = "";
//tits[4] = "";
//tits[5] = "";
//tits[6] = "";
//tits[7] = "";
var imgwidth = 505;//图片宽度
var imgheight =140;//图片宽度
var str = "<style type='text/css'>";
str += "#imgnv{display:none;text-align:center;width:172px;height:31px;margin-left:37px;padding-top:9px;margin-top:10px;}#imgnv ul{padding-left:14px;}#imgnv ul li{float:left;padding-left:38px;font-weight:bold;cusor:hand;}";
str += ".on{color:#FFF;}";
str += ".off{color:#FF6600;}";
str += "#titnv{margin-top:3px;color:#000;text-align:center;display:none;}";
str += "</style>";
str += "<div style='position:relative'>";
str += "<div><a id='dlink' href='" + links[1] + "' target='_self'><img id='dimg' src='" + imgs[1].src + "' border='0' width='" + imgwidth + "' height='"+imgheight+"' style='filter:Alpha(opacity=100)' onmouseover='Pause(true)' onmouseout='Pause(false)'></a></div>";
//修改点1：循环添加内层div内容以增加个数
str += "<div id='imgnv'><ul><li id='it1' class='on' onmouseover='ImgSwitch(1, true)' onmouseout='Pause(false)' style='padding-left:0;'>1</li><li id='it2' class='off' onmouseover='ImgSwitch(2, true)' onmouseout='Pause(false)'>2</li><li id='it3' class='on' onmouseover='ImgSwitch(3, true)' onmouseout='Pause(false)'>3</li><li id='it4' class='off' onmouseover='ImgSwitch(4, true)' onmouseout='Pause(false)' style='padding-left:40px;'>4</li><li id='it5' class='off' onmouseover='ImgSwitch(5, true)' onmouseout='Pause(false)' style='padding-left:40px;'>5</li><li id='it6' class='off' onmouseover='ImgSwitch(6, true)' onmouseout='Pause(false)' style='padding-left:40px;'>6</li><li id='it7' class='off' onmouseover='ImgSwitch(7, true)' onmouseout='Pause(false)' style='padding-left:40px;'>7</li></ul></div>";
str += "<div id='titnv'><b>" + tits[1] + "</b></div>";
str += "</div>";
document.write(str);
var oi = document.getElementById("dimg");
var pause = false;
var curid = 1;
var lastid = 2;
var sw = 1;
var opacity = 100;
var speed = 30;
var delay = (document.all)? 219:344;
var checkid = setInterval(CheckLoad, 10);