The order of the css and js files are wrong.
At present, the order is as below at: http://ajeykamat.com/Abroad_Mbbs
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="Content/menu/styles.CSS">
<script async="" src="//www.google-analytics.com/analytics.js"></script>
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script>
// analytics code
</script>
<script src="Content/menu/script.js"></script>
<title>
Abroad_Mbbs - Ajey Kamat : MBBS in Russia | MBBS in Kyrgyzstan | MBBS in Ukraine | MBBS in Philippines | MBBS in Poland | MBBS in Bangladesh
</title>
<script src="/bundles/modernizr?v=wBEWDufH_8Md-Pbioxomt90vm6tJN2Pyy9u9zHtWsPo1"></script>
<link href="/Content/css?v=wFlI7GPr8DB0VuPXheNHY8X5NoDOTpjcfLo3B5h4Yzk1" rel="stylesheet">
<link href="favicon.ico" rel="shortcut icon" type="image/x-icon">
It should be as below:
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="favicon.ico" rel="shortcut icon" type="image/x-icon">
<script async="" src="//www.google-analytics.com/analytics.js"></script>
<title>Abroad_Mbbs - Ajey Kamat : MBBS in Russia | MBBS in Kyrgyzstan | MBBS in Ukraine | MBBS in Philippines | MBBS in Poland | MBBS in Bangladesh
</title>
<script src="/bundles/modernizr?v=wBEWDufH_8Md-Pbioxomt90vm6tJN2Pyy9u9zHtWsPo1"></script>
<link href="/Content/css?v=wFlI7GPr8DB0VuPXheNHY8X5NoDOTpjcfLo3B5h4Yzk1" rel="stylesheet">
<link rel="stylesheet" href="Content/menu/styles.CSS">
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script src="Content/menu/script.js"></script>
<script>
// analytics code
</script>
Note that the CSS and Javascript should needed to be loaded one after another. Priority matters here.
Also, please make sure to use absolute path instead of relative ones. using relative paths causes 404 error, if you're using url rewrite. More details about it at: Difference between Relative path and absolute path in javascript