想在javascript函数中传递php变量作为参数吗？

Question

i want to pass my php variable in one javascript function.
i know it seems simple but i don't know where am i missing something?

    <?php
        while($gg=mysql_fetch_array($lg))
        {
    ?>
        <td id="add_td">
        <?php
        $id = $gg['p_id'];
        echo "<a onclick=cnf('Are you sure you want to delete that?',$id)>"; ?>Delete</a>
        </td>
<?php
        }
?>

and in my javascript function

function cnf(msg,id)
{

     cnf = confirm(msg);
     if(cnf) { 
            parent.location.href = 'p_update.php?d=' + id;          
     }
}

so i need to know on which id that user had clicked so that i will only delete that id from database.
if i try this thing then it showing error on "cnf" function and its saying like "unterminated string literal"?

Answer 1

if $id is not numeric you should write 

<?php
        while($gg=mysql_fetch_array($lg))
        {
    ?>
        <td id="add_td">
        <?php
        $id = $gg['p_id'];
        echo "<a onclick=cnf('Are you sure you want to delete that?','".$id."')>"; ?>Delete</a>
        </td>
<?php
        }
?>