不警告从onclick php函数传递的变量值

Question

on click, a)I am not getting alert, when i pass $picname variable to jquery img function(the value of the $picname is tulips.jpg)

b)i am getting the alert (22) when i pass the variable $picid(the value of the $picid is 22)

i think jquery function does not alert images extentions,if so then how can i pass the image name variable whose value having extension,to the jquery function to use its value

function profile(){


$sql = mysql_query("SELECT * FROM profile");
    while ($row = mysql_fetch_array($sql)) {
        $picname= $row['picname'];
        $picid= $row['id'];

        ?>


    <table  style="margin-left: 110px">




        <tr><td><a href="#img" class="ok"><img style='width: 200px' src="images/<?php echo $picname ?>"   alt="name" onclick=img(<?php echo $picname ?>);  ></a></td></tr>


    </table>
<?php


}}

jquery function is

function img(n){
alert(n);
}

Answer 1

You need to use the single quote for JS strings and it wouldn't also be bad to use a double quote to wrap the value of the onclick attribute

onclick="img('<?php echo $picname ?>')"
             ^                      ^  

Answer 2

here is the problem

<a href="#img" class="ok"><img style='width: 200px' src="images/<?php echo $picname ?>"   alt="name" onclick=img(<?php echo $picname ?>);  ></a>

should be

<a href="#img" class="ok"><img style='width: 200px' src="images/<?php echo $picname ?>"   alt="name" onclick="img('<?php echo $picname ?>')"  ></a>