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count or sum of checked boxes in a table

I have a table setup with two columns (side1 and side2).  
<table border = "1" width="100%" id="Table1">
<td class = 'Side1'>checkbox is here</td>  <td class = 'Side2'>checkbox is here</td>


I need to make sure that at least one checkbox is checked on side1 and at least one is checked on side2.

I tried the following but I am getting a syntax error somewhere...I don't even know if this would be the correct way to do it.

        var sideTotal = [];
        $('#table1 .Side1').each(function(){
            sideTotal[0]+= $(this) :checked.val();
        });
        alert(sideTotal[0]);

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Avatar of leakim971
leakim971
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var sideTotal = [];
var n = $('.Side1,.Side2', '#table1').size();
alert(n);
sideTotal[0] = n;

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ASKER

Would't this return the count of all "Side1" and "Side2", regardless of checked or not?

Well, if it does, then I have a bigger problem because I get an alert with zero.
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Avatar of leakim971
leakim971
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I needed each one seperately, but that gave me what I needed.  Thanks.
        var canContinue = 1;
        var n        
            n = $('.Side1', '#Table1').find(":checkbox:checked").size();
            if (n == 0) {
                alert('You need to select at least one item in the first column');
                canContinue = 0;
            }
     
            n = $('.Side2', '#Table1').find(":checkbox:checked").size();
            if (n == 0) {
                alert('You need to select at least one item in the second column');
                canContinue = 0;
            }

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