jquery to check if returned data object is empty

Question

$("#post").live("click",function()
{
    $("input:checkbox[name='bookmarkid']:checked").each(function()
    {
         $.post("php/socialbookmark-post.php", {bookmarkID: $(this).val()},function(data)
         {
              if(data != "") alert(data);
         });
    });
});

the php file outputs some text only if something goes wrong. The checking that I do fails if the data is empty and displays an empty message. I need to fix this. Any ideas?

Answer 1

You could instead check if data exists, like this:

if(data && data !="") alert(data);

data will be null in your case, and null != "", so the if is passing.