js filter 兼容问题~，跪求~

Question

<img id=img src="http://www.toncom.com/images/logo.gif" width="200" height="135" >
<img src="http://www.eubocn.com/images/logo.gif" onClick="img('http://www.eubocn.com/images/logo.gif')"/>
<SCRIPT language=javascript defer>
function img(obj){
var img = document.getElementById("img");
img.style.filter="revealTrans(duration=1)";
img.style.filter="revealTrans(transition=23)";
img.filters(0).apply();
img.src = ""+obj
img.filters(0).play();
}
</SCRIPT>这段不兼容火狐，不兼容效果，但是火狐都不切换，IE6有效果，火狐连图片地址都得不到？帮忙看看~

Answer 1

revealTrans是IE专用的，属于微软的扩展

Answer 2

<img id="img1" src="http://www.toncom.com/images/logo.gif" width="200" height="135" >
<img src="http://www.eubocn.com/images/logo.gif" onClick="img('http://www.eubocn.com/images/logo.gif')"/>
<SCRIPT language=javascript defer>
function img(obj){
var img = document.getElementById("img1");
if(document.all){
img.style.filter="revealTrans(duration=1)";
img.style.filter="revealTrans(transition=23)";
img.filters(0).apply();}
img.src = ""+obj
if(document.all){
img.filters(0).play();}
}
</SCRIPT>这样吧
至少在ff不会出错

Answer 3

cloudgamer 帮忙注释一下好吗？两个IF有什么区别？if(document.all){
img.style.filter="revealTrans(duration=1)";
img.style.filter="revealTrans(transition=23)";
img.filters(0).apply();}
img.src = ""+obj
if(document.all){
img.filters(0).play();}
}

Answer 4

if(window.Event) oEvent=window.Event
判断是否是同一个浏览器，是的话则执行第二句

Answer 5

if(document.all){
img.style.filter="revealTrans(duration=1)";
img.style.filter="revealTrans(transition=23)";
img.filters(0).apply();}
img.src = ""+obj
if(document.all){
img.filters(0).play();}
}那两个语句都是判断IE啊？

Answer 6

FF中document.all未定义，所以判断得出是IE

Answer 7

可以加上if else 来判断是什么浏览器，再加上适当的代码