How to put a jQuery code into one file which will be referenced by all pages?

Question

I have a login popup that will pop up on every page of my site. What I want to do is once the user clicks submit, to have a single JS file where the jQuery code for handling that request lives, and makes an AJAX call to validate the parameters in the DB.

I am able to get the pop up box to pop up. And the form loads. I am thinking my jQuery code will live in a separate imported file and look like this:

<script type="text/javascript" >
$(function()
{
    $("input[type=submit]").click(function()
    {
        var some_params= $("#param").val();

        var dataString = 'Some url to send to ajax';

        if( params validated ok )
        {
            $('.success').fadeOut(200).hide();
            $('.error').fadeOut(200).show();
        }
        else
        {
            $.ajax({
                type: "POST",
                url: "/problems/add_problem.php",
                dataType: "json",
                data: dataString,
                success: function(json)
                {
                    $('.success').fadeIn(200).show();
                    $('.error').fadeOut(200).hide();    
                }
            });
        }

        return false;
    });
});
</script>

So my question is how do I make this get invoked only when the right form is submitted? The form would have some id="some_name" but I don't really understand how to make this jQuery code get executed only when that form element is called.

And here is the form I am calling to display in the popup:

<?php
         echo '<div id="login_div">
         <form id="login_form" method="post" action="">
         <p>
             <label for="name"><span>Your Email:</span></label> <input type="text" name="email" />
         </p>
         <p>
             <label for="name"><span>Your Password:</span></label> <input type="password" name="user_pass">
         </p>
         <p>
            <input type="submit" value="Log In"  />
         </p>
         </form>
         </div>


<p>
    <a href="http://www.problemio.com/auth/create_profile.php">Create Account</a> | <a href="http://www.problemio.com/auth/forgot_password.php">Reset Pass</a>
</p>
         ';
?>

and here is the problemio.js contents with the jQuery to handle the login form submit:

// javascript library

// login_form

$(function()
{
    $("#login_form input[type=submit]").click(function()
    {
        console.log("test");
        alert("1");
//      var name = $("#problem_name").val();
//      var problem_blurb = $("#problem_blurb").val();

//      var dataString = 'problem_name='+ name + '&problem_blurb=' + problem_blurb;

//      if(name=='' || problem_blurb == '')
//      {
//          $('.success').fadeOut(200).hide();
//          $('.error').fadeOut(200).show();
///     }
//      else
//      {
//          $.ajax({
//              type: "POST",
//              url: "/problems/add_problem.php",
//              dataType: "json",
//              data: dataString,
//              success: function(json)
//              {
//                  $('.success').fadeIn(200).show();
//                  $('.error').fadeOut(200).hide();
//                  
///                 // Here can update the right side of the screen with the newly entered information
//                  //alert (json);
//          
//                  new_string = "<h2>Most Recently Added Problems</h2>";

                    // Have to figure out how to make this work with the DOM.

//              }
//          });
//      }

        return false;
    });
});

Answer 1

You can use .submit() to attach a handler to the form submit event. First you'll need to select your form via the id:

$("#some_form_id").submit(function() {
    // the code you have in the click event above goes here.
});

Answer 2

Two things. First, when you place the code above into a separate javascript file, be sure to remove the <script ..> and </script> HTML tags.

Next, alter the following line:

$("input[type=submit]").click(function()

To instead say:

$("#loginform input[type=submit]").click(function()

And then set id="loginform" on your <form> tag.

Answer 3

You can specific the form you want to trigger the jquery. http://api.jquery.com/submit/

Answer 4

If you are not sure, just right-click this webpage and read its html code.

<script type="text/javascript" src="some.js"></script>

And also, binding the the function to form.submit is much better than to the submit button.

$('formid').submit(function(){blablabla;return false;})

Answer 5

如果您想在不使用ID的情况下处理页面上每个提交的click事件，则始终可以在click事件中使用this关键字来查找发件人，然后找到父form 。