Tough Random color with restriction

I am trying my luck here to learn from each other how to solve this.

1) I need intake only td with no class and ignore all td with class, to get total number of boxes something like this to replace below - var spans = $("#tlb tr:not(.twentyNine .thirty .thirtyOne) td"), instead of var spans = document.getElementById('tbl').getElementsByTagName('td'); but it not working, and :not does not work in ie

Reason for this, i group 9 box as 1 , for example if user type 30, box 31(9 boxes) will...

Tough Random color with restriction

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