javascript error

I have the following javascript on a web page.
It works fine with Internet Explorer, but on a Galaxy Tablet, it does nothing.  
Am I missing a character somewhere ?  I believe it may be something with the 'else' line (if I comment that line out, the rest works).

if (document.form1.AddItem7Amount.value > "0")
      {document.form1.AddItem7MarginPercent.value=+(parseFloat(document.form1.AddItem7AmountExt.value)-parseFloat(document.form1.AddItem7CostExt.value))/+parseFloat(document.form1.AddItem7AmountExt.value);
      document.form1.AddItem7MarginPercent.value=+(Math.round(document.form1.AddItem7MarginPercent.value*1000))/10};
    else document.form1.AddItem7MarginPercent.value = "0";
drelingerAsked:
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Robert SchuttConnect With a Mentor Software EngineerCommented:
I'm not a 100% sure why IE compiles/runs this without a problem as opposed to Firefox (and others probably). Normally you don't use a semicolon to terminate statement blocks used in if/for etc, only for single statements.

Chrome clearly points out the problem:
capture
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Robert SchuttSoftware EngineerCommented:
Try removing the semicolon preceding the else:
if (document.form1.AddItem7Amount.value > "0")
      {document.form1.AddItem7MarginPercent.value=+(parseFloat(document.form1.AddItem7AmountExt.value)-parseFloat(document.form1.AddItem7CostExt.value))/+parseFloat(document.form1.AddItem7AmountExt.value);
      document.form1.AddItem7MarginPercent.value=+(Math.round(document.form1.AddItem7MarginPercent.value*1000))/10} // no ; here!
    else document.form1.AddItem7MarginPercent.value = "0"; 

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AnuTijiConnect With a Mentor Commented:
Hi

Try adding curly brackets for the else

if (document.form1.AddItem7Amount.value > "0")
      {document.form1.AddItem7MarginPercent.value=+(parseFloat(document.form1.AddItem7AmountExt.value)-parseFloat(document.form1.AddItem7CostExt.value))/+parseFloat(document.form1.AddItem7AmountExt.value);
      document.form1.AddItem7MarginPercent.value=+(Math.round(document.form1.AddItem7MarginPercent.value*1000))/10};
    else { document.form1.AddItem7MarginPercent.value = "0";}
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drelingerAuthor Commented:
when I comment that line out, the javascript run fine and calculates the fields.

When I leave that line in, the javascript doesn't run and none of the fields are calculated.

This fails on a Galaxy Tablet and also on the Blackberry browser.

The script runs fine either way on Internet Explorer.

Any reasons they would have an issue with that one line ? Just commenting out the 'else' line makes it work fine. strange.
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drelingerAuthor Commented:
...this is the element on the page. but I don't see any issue there.

<input name="AddItem7MarginPercent" type="text" class="mystyle31" id="AddItem7MarginPercent" size="2" maxlength="5" readonly="true">
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Robert SchuttSoftware EngineerCommented:
I tried it in FireFox and the problem is that the code is syntactically incorrect and doesn't compile/run at all. removing the semicolon before the else makes it work (as does commenting out the else but then it's different code).
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