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javascript - page loaded differently with jQuery-mobile transition

I have a site that works fine when loaded directly (f.e. by calling its URL), however, when I get to the site through a slider transition:

<li><a href="html/mySite.html" data-transition="slide">mySite</a></li>

it seems as if it would not load a .js file which is just declared within head as:

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

I am new to jQuery mobile, and jQuery, and HTML5, and JS. So... can someone explain to me what is the difference between a URL call and a jQuery mobile transtition regarding to the loading of the page?

(btw. I am using it to develop an Android-App)

See Question&Answers more detail:os

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In case of multiple HTML files, HEAD is only loaded in the first HTML file. In other files, only a BODY content is loaded. This is because AJAX is used to load other pages into the DOM. Because there's already a HEAD content inside an original DOM only a body will be loaded from the other pages.

This can be prevented if you turn AJAX loading completely, or if you initialize all of your js fils inside a first HTML file.

If you want to find out more take a look at my other ANSWER with several other solutions, or find it HERE.

Example 1: Correct way

HTML 1 :

<!DOCTYPE html>
<html>
<head>
    <title>jQM Complex Demo</title>
    <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=no; target-densityDpi=device-dpi"/>
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
    <script src="http://www.dragan-gaic.info/js/jquery-1.8.2.min.js"></script> 
    <script>
              $(document).on('pagebeforeshow', '#index', function(){       
                        alert('Page One');
                });
                
                $(document).on('pagebeforeshow', '#second', function(){       
                        alert('Page Two');                  
                });         
    </script>      
    <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>   
</head>
<body>
    <div data-role="page" id="index">
        <div data-theme="a" data-role="header">
            <h3>
                First Page
            </h3>
            <a href="second.html" class="ui-btn-right">Next</a>
        </div>

        <div data-role="content">

        </div>

        <div data-theme="a" data-role="footer" data-position="fixed">

        </div>
    </div>    
</body>
</html>   

HTML 2 :

    <div data-role="page" id="second">
        <div data-theme="a" data-role="header">
            <h3>
                Second Page
            </h3>
            <a href="index.html" class="ui-btn-left">Back</a>
        </div>

        <div data-role="content">

        </div>

        <div data-theme="a" data-role="footer" data-position="fixed">

        </div>
    </div>       

Example 2: Incorrect way

HTML 1 :

<!DOCTYPE html>
<html>
<head>
    <title>jQM Complex Demo</title>
    <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=no; target-densityDpi=device-dpi"/>
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
    <script src="http://www.dragan-gaic.info/js/jquery-1.8.2.min.js"></script> 
    <script>
              $(document).on('pagebeforeshow', '#index', function(){       
                        alert('Page One');
                });     
    </script>      
    <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>   
</head>
<body>
    <div data-role="page" id="index">
        <div data-theme="a" data-role="header">
            <h3>
                First Page
            </h3>
            <a href="second.html" class="ui-btn-right">Next</a>
        </div>

        <div data-role="content">

        </div>

        <div data-theme="a" data-role="footer" data-position="fixed">

        </div>
    </div>    
</body>
</html> 

HTML 2 :

<!DOCTYPE html>
<html>
<head>
    <title>jQM Complex Demo</title>
    <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; minimum-scale=1.0; user-scalable=no; target-densityDpi=device-dpi"/>
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.css" />
    <script src="http://www.dragan-gaic.info/js/jquery-1.8.2.min.js"></script> 
        <script>
                $(document).on('pagebeforeshow', '#second', function(){       
                        alert('Page Two');                  
                }); 
        </script>         
    <script src="http://code.jquery.com/mobile/1.2.0/jquery.mobile-1.2.0.min.js"></script>   
</head>
<body>    
    <div data-role="page" id="second">
        <div data-theme="a" data-role="header">
            <h3>
                Second Page
            </h3>
            <a href="index.html" class="ui-btn-left">Back</a>
        </div>

        <div data-role="content">

        </div>

        <div data-theme="a" data-role="footer" data-position="fixed">

        </div>
    </div>    
</body>
</html>       

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