"IE blows" or "Object doesn't suppor this property or method"

[Doc Thirst]

In typical IE fashion the error offers little to no help. The code isn't complex, perhaps one of you JS guru's can help me fix it up (this is actually php script, so don't mind the \" and $'s. All this is supposed to do is swap the buttons when the checkbox is checked. Works fine in every browser I have installed except IE which tosses up the ever so helpful title error. Thanks for looking.

HTML:

<tr bgcolor=$rowcolor>
<td align=center colspan=6>
<input type=checkbox name='complete' onClick=\"show_button();\"> Complete Report and Send for Final Sign Off
</td>
</tr>
<tr bgcolor=$rowcolor id='complete_button' style=\"display:none\">
<td align=center colspan=6>
<input type=submit name='sub_state' value='Complete Report'>
</td>
</tr>
<tr bgcolor=$rowcolor id='preview_button'>
<td align=center colspan=6>
<input type=submit name='sub_state' value='Preview Report'>
</td>
</tr>

Javascript:

function show_button()
{
if(document.report_form.complete.checked==true)
{
document.report_form.getElementById('preview_button').style.display="none";
document.report_form.getElementById('complete_button').style.display="";
}
else
{
document.report_form.getElementById('preview_button').style.display="";
document.report_form.getElementById('complete_button').style.display="none";
}
}

[WolfShade]

Instead of having two submit buttons and try to toggle display mode, use one submit button, default the value to "Preview", and set the logic in the function to alter the value to "Complete" if the checkbox is checked. The two submits are identical except for value.

document.report_form.sub_state.value == "Preview/Complete";

^_^

[Doc Thirst]

Cool thanks, I'll give that a whirl.

[aj_nsc]

No comment on the problem, but the love the Rocky and Bullwinkle throwback title. Awesome.

[WolfShade]

document.report_form.sub_state.value == "Preview/Complete";

Sorry.. this should have only ONE "=", not two.

document.report_form.sub_state.value = "Preview/Complete";

[Doc Thirst]

Funny I was just coming back here to say your solution worked like a charm, with the noted exception you just posted. I'm not used to looking at JS so it took me a minute to track down the issue. Thanks again for the solution, and kudos to the other R&B fan.