将PHP传递给Javascript [关闭]

I have a PHP variable I want to add in Javascript, the problem is it's not getting the variable, please help I'm new to javascript. Sorry I think I did not explain very good.

At the moment I have three select boxes displaying Year, month, date the value of $row_info['birth'] is 2011-04-01. When I apply date to defaultDate: the value is not in there.

<?php
    $date = $row_info['birth'];
    echo("<script type='text/javascript'>
");
    echo("date = '{$row_info['birth']}';
");
    echo("</script>");
?>

<script type="text/javascript">
$(document).ready(function(){
    $("#picker3").birthdaypicker({
        dateFormat: "bigEndian",
        monthFormat: "short",
        placeholder: false,
        defaultDate: date,
        hiddenDate: true
      });
  });
</script>

I would really appreciate some help, thanks

<?php
    $date = $row_info['birth'];
    echo("<script type='text/javascript'>
");
    echo("date = '{".$row_info['birth']."}';
");
    echo("</script>");
?>

<script type="text/javascript">
    $("#picker3").birthdaypicker({
        dateFormat: "bigEndian",
        monthFormat: "short",
        placeholder: false,
        defaultDate: date,
        hiddenDate: true
      });
  });
</script>

<script type="text/javascript">
date = <?php echo $row_info['birth'];?>;
$("#picker3").birthdaypicker({
    dateFormat: "bigEndian",
    monthFormat: "short",
    placeholder: false,
    defaultDate: date,
    hiddenDate: true
  });
});
</script>