I use code like this:
code on the top of the html page:
<SPAN id=L4EVER>LOADING...</SPAN>
insert code on the footer of the page:
<SPAN class=spanclass id=AD_L4EVER>
your js code here</SPAN>
<script>L4EVER.innerHTML=AD_L4EVER.innerHTML;AD_L4 EVER.innerHTML="";</script>

It can work in IE6.0,but cannot work in firefox3.0.2.
Who can tell me How to make js code loading delay in firefox?

Because IE will run all kinds of badly designed code, whereas Firefox needs the correct syntax.

I want to know how to deal with this problem.Thank you.

What exactly are you trying to accomplish? We can probably guess of course, but having first hand knowledge is much better.

How to make js code loading delay in firefox ,Is there anyone can give me some help?

It is ok to do like this.
<script>document.getElementById("L4EVER").innerHTM L=document.getElementById("AD_L4EVER").innerHTML;d ocument.getElementById("AD_L4EVER").innerHTML="";</script>