Display/Hide function not working in Firefox

I have been using this javascript for awhile now, and just realized that it does not work in Firefox, any ideas why?

<script language="JavaScript">
<!--
function Show_Stuff(Click_Menu)
// Function that will swap the display/no display for
// all content within span tags
{
if (Click_Menu.style.display == "none")
{
Click_Menu.style.display = "";
}
else
{
Click_Menu.style.display = "none";
}
}
-->
</script>

The javascript is getting called with a link like this:
<a href="javascript:Show_Stuff(display1)">Click Here</a>

And then that will show or hide what is in this span:
<span ID="display1" style="display: none"> STUFF HERE </span>

This works fine in IE. Thanks in advance.

 

<script type="text/javascript">

function Show_Stuff(Click_Menu_ID){

	var nSpan = document.getElementById(Click_Menu_ID);
	if (nSpan.style.display == "none")
		{
		 nSpan.style.display = "";
		}
	else
		{
		 nSpan.style.display = "none";
		}
}

</script>

Code (markup):

<a href="#" onclick="Show_Stuff('display1');return false">Click Here</a>

Code (markup):

<span id="display1" style="display:none"> STUFF HERE </span>

Code (markup):

 

Thanks - works perfectly!

I see now where my lack of attention to detail was to blame.

 

You're welcome, but I don't see how you failed to pay attention to detail. I learn new things all the time.