JS 在firefox中无法使用

Question

function goToUp(imagepath,imageid){
//在原位置移除图片
var img=document.getElementById(imageid);
var parent = img.parentNode;
parent.removeChild(img);

//删除下面的隐藏表单域
var inphid=document.getElementById("id"+imageid);
var parent = inphid.parentNode;
parent.removeChild(inphid);

//在上面添加一个隐藏表单域
var ssuubb=document.getElementById("ssuubb");
var upid=document.createElement("input");
upid.id="id"+imageid;
upid.type="hidden";
upid.name="UP_ID";
upid.value=imageid;
ssuubb.appendChild(upid);
//创建IMG节点
var img=document.createElement("img");
img.src=imagepath;
img.id=imageid;
img.attachEvent("onclick",function(){goToDown(imagepath,imageid)}); 
img.style.cursor="pointer";
//img.style.width="80";
//img.style.height="80";
img.border=5;
img.style.borderColor="#FFFFFF";
//找到上面的照片集的块
var updiv=document.getElementById("updiv");
//放入进去
updiv.appendChild(img);
updiv.scrollTop = updiv.scrollHeight;
}

function goToDown(imagepath,imageid){
//在原位置移除图片
var img=document.getElementById(imageid);
var parent = img.parentNode;
parent.removeChild(img);
//在块里面移除隐藏控件并放在下面
var inphid=document.getElementById("id"+imageid);
var parent = inphid.parentNode;
parent.removeChild(inphid);

var rreett=document.getElementById("rreett");
var upid=document.createElement("input");
upid.id="id"+imageid;
upid.type="hidden";
upid.name="ALL_UP_ID";
upid.value=imageid;
rreett.appendChild(upid);

//创建IMG节点
var img=document.createElement("img");
img.src=imagepath;
img.id=imageid;
img.attachEvent("onclick",function(){goToUp(imagepath,imageid)}); 
img.style.cursor="pointer";
//img.style.width="80";
//img.style.height="80";
img.border=5;
img.style.borderColor="#FFFFFF";

//找到上面的照片集的块
var downdiv=document.getElementById("downdiv");
//放入进去
downdiv.appendChild(img);
downdiv.scrollLeft = downdiv.scrollWidth;
}
function init(imagepath,imageid,site){
//创建IMG节点
var img=document.createElement("img");
img.src=imagepath;
img.id=imageid;
img.border=5;
img.style.borderColor="#FFFFFF";
if(site=="updiv"){
var ssuubb=document.getElementById("ssuubb");
var upid=document.createElement("input");
upid.id="id"+imageid;
upid.type="hidden";
upid.name="UP_ID";
upid.value=imageid;
ssuubb.appendChild(upid);
img.attachEvent("onclick",function(){goToDown(imagepath,imageid)}); 
}
if(site=="downdiv"){
var rreett=document.getElementById("rreett");
var upid=document.createElement("input");
upid.id="id"+imageid;
upid.type="hidden";
upid.name="ALL_UP_ID";
upid.value=imageid;
rreett.appendChild(upid);
img.attachEvent("onclick",function(){goToUp(imagepath,imageid)}); 
}

img.style.cursor="pointer";
//img.style.width="80";
//img.style.height="80";

//找到上面的照片集的块
var site=document.getElementById(site);
//放入进去
site.appendChild(img);
}
这是一段 调用外部的js文件，可是在firefox 里根本无法使用 ，求救～～～