javascript validation error -

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here's code, says error when run through w3.validator.org.

for (var = 0; < checkbox.length; i++)

error message - character "<" first character of delimiter occurred data

how fix this?

if "using" xhtml need wrap code in cdata:

<script type="text/javascript"> //<![cdata[  // rest of javascript goes here  //]]> </script>

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