$(document).ready(function() {

        //search form
        $('#search_video').focus(function() {
          var q = $('#search_video').val ();
          if (q == "Search")
            $('#search_video').val ("");
        });
        
        $('#search_video').blur(function() {
          var q = $('#search_video').val ();
          if (q == "")
            $('#search_video').val ("Search");
        });
        
        //submit
        $('#search_form').submit(function() {
            var q = $('#search_video').val ();
            
            if (q == "" || q == "Search")  {
              alert('Please enter keywords.');
              $('#search_video').focus ();
              return false;
            }
           
        });

});

//add video comment
function addComment (video_id)
{
        document.getElementById("submit").disabled = true;
        document.getElementById("submit").value = "Please wait..";
        var user_name = document.getElementById("user_name").value;
        var user_email = document.getElementById("user_email").value;
        var user_url = document.getElementById("user_url").value;
        var comment_description = document.getElementById("comment_description").value;
        if(user_name == "")
        {
            alert ("Please fill your name.");
            document.getElementById("user_name").focus();
            document.getElementById("submit").disabled = false;
            document.getElementById("submit").value = "Add Comment";
        }
        else if (comment_description == "")
        {
            alert ("Please fill your comment.");
            document.getElementById("comment_description").focus();
            document.getElementById("submit").disabled = false;
            document.getElementById("submit").value = "Add Comment";
        }
        
        $.ajax ( {
            type : "POST",
            url : save_comment_url,
            data : "videoId=" + video_id + "&userName=" + user_name + "&userEmail=" + user_email +"&userUrl=" + user_url + "&commentDescription=" + comment_description +"",
            success:function (msg) {
               if(msg == 'Thank you for your comment. We will review it.'){
                    document.getElementById("comment").innerHTML = msg;
               }
               else {
                
               }
           
            }
        })
}