Color table using javascript.

header.js

<script type="text/javascript">jQuery(document).ready(function ($) {

$('table').css({
  'border-collapse':'collapse'
});

$('tr th').css({'background':'#666666', 'color':'#ffffff', 'font-family':'verdana', 'font-weight':'normal'});

// Here using jquery selectors
$('tr:even').css({'background':'#f5f5f5'});
$('tr:odd').css({'background':'#e3e3e3'});

});
</script>