41

I have searched high and low for an answer and have found similar examples of the problem but the answers do not apply to my scenario. The reality is I am new to this and therefore I don't have the skills to adapt the answers I have found to my problem.

The problem:

I have a Div in which when a thumbnail is clicked the Div image replaces with another image via a JavaScript/jQuery script (I am not sure exactly maybe someone could clarify). This works fine however the problem is the page scrolls back to the top and the user then has to scroll back down to see the image after it has replaced itself.

I have looked online and have found that a return false: in the JavaScript may help however I have looked and return false is already present.

The other option I have looked at using is a JavaScript cookie based solution in which a cookie is sent, and the browser scroll position is maintain by reading the cookie however I cant seem to get that solution to work, I think the issue may be caused because I am hosting locally but I may be wrong...

The third is using a PHP script but I have not found a definitive answer on this method and it also means I am going to have to learn about PHP (something I'm sure I will have to learn in time anyway).

Here is the JavaScript:

<script type="text/javascript">

 $(document).ready(function() {
  $('.galleryicon').live("click", function() {

    $('#mainImage').hide();
    $('#cakebox').css('background-image', "url('ajax-loader.gif')");
    var i = $('<img />').attr('src',this.href).load(function() {
        $('#mainImage').attr('src', i.attr('src'));
        $('#cakebox').css('background-image', 'none');
        $('#mainImage').fadeIn();
    });
    return false; 
   });
 });

</script>

Here is the html:

<div class="cakecont">

  <div id="cakebox">

 <img src="../images/cakes/babycake1.png" alt="Main Image" id="mainImage"/>

     <div class="pageinfo2">
     <h3>Cake Type 1</h3>
     <h6>£2.00</h6>
     </div>
     <div class="infobox">
     <h6> Description </h6>
     </div> 

      <div class="gallerybox">
      <a href="../images/cakes/babycaketop.png" class="galleryicon">
      <img src="../images/thumbs/babycaketopsml.png" alt="Thumbnail 2"/></a>

      <a href="../images/cakes/babycake1.png" class="galleryicon">
      <img src="../images/thumbs/babycakesml.png" alt="Image 1"/></a>
   </div>
  </div>
</div>

And here is a link to the working demo http://micahcarrick.com/code/jquery-image-swap/index.html

I have tried to resolve this on my own. This is the first question I have had to ask so far regarding the building of my website, all my learning and remedies to past problems have been served by Google, this one has eluded my search engine skills.

Below I have added all the html for the page in case there may be other script overriding the "new" modified JavaScript - 

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org     /TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml"><head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>Cupcakes &amp; Cakes for Birthday/Wedding Gift in Bournemouth Dorset - SweetVision</title>
   <meta name="keywords" content="cupcakes, cake, gift, wedding, birthday, Bournemouth, Dorset" />
 <meta name="description" content="For the finest Cupcakes and Cakes in Bournemouth Dorset look no further, Sweetvision specialise in baked goods for Weddings, Birthdays, Baby Showers, Easter, Halloween, Christmas" />
 <meta name="robots" content="ALL" />
 <meta http-equiv= "Content-Language" content="en" />
 <meta name="Publisher" content="Sweet Vision" />
 <meta name="Copyright" content="Copyright 2012, Sweet Vision, All rights reserved." />
 <meta name="Author" content="Mark Webb for Sweet Vision - www.sweetvision.co.uk" />

  <link href="../images/homepage/favicon.ico" type="image/vnd.microsoft.icon" rel="shortcut icon" />

  <link href="../root/css/sweetvision.css" rel="stylesheet" type="text/css" />

  <script src="../js/jquery-1.4.2.min.js" type="text/javascript"></script>

  <script type="text/javascript">

 $(document).ready(function() {   
$('.galleryicon').live("click", function(e) {  // the (e) represent the event
$('#mainImage').hide();     
$('#cakebox').css('background-image', "url('ajax-loader.gif')");     
var i = $('<img />').attr('src',this.href).load(function() {         
  $('#mainImage').attr('src', i.attr('src'));         
  $('#cakebox').css('background-image', 'none');         
  $('#mainImage').fadeIn();     
 });
 e.preventDefault(); //Prevent default click action which is causing the 
 return false;       //page to scroll back to the top
 });  
});


</script>

<script src="../js/s3Slider.js" type="text/javascript"></script> 

 <script type="text/javascript">

 $(document).ready(function() {
 $('#s3slider').s3Slider({
  timeOut: 4000
  });
}); 
  </script>

  <script src="../js/SpryMenuBar.js" type="text/javascript"></script>
  <link href="../root/css/SpryMenuBarHorizontal.css" rel="stylesheet" type="text/css" />

  </head> 


 <body>



  <div class="container">


 <div class="sprybox">
   <ul id="check_menu" class="MenuBarHorizontal">
    <li><a href="../root/index.html">Home</a></li>
    <li><a href="../root/aboutus.html" class="MenuBarItemSubmenu">About Us</a>
      <ul>
        <li><a href="../root/contactus.html">Contact</a></li>
        <li><a href="../root/news.html">News</a></li>
        <li><a href="../root/events.html">Events</a></li>
      </ul>
    </li>
       <li><a href="../root/ourmenu.html">Our Menu</a></li>
         <li><a href="gallery.html">Gallery</a></li>
          </ul>
        <div class="mainmenu">
           <a href="../root/mainmenu.html">
           <img src="../images/buttons/mainmenu.png" />
           </a>
       </div>
        <div class="backbutton">
        <a href="javascript:history.go(-1)"> 
        <img src="../images/buttons/Backbutton.png" /></a>
      </div>

    </div>  <!-- end.header --><!--end of sprybox -->

  <!--end div element -->


 <!-- thumbnails are links to the full size image -->

  <div class="cakecont">

 <div id="cakebox">

  <img src="../images/cakes/babycake1.png" alt="Main Image" id="mainImage"/>

     <div class="pageinfo2">
     <h3>Cake Type 1</h3>
     <h6>£2.00</h6>
     </div>
     <div class="infobox">
     <h6> Description </h6>
     </div> 

 <div class="gallerybox">
      <a href="../images/cakes/babycaketop.png" class="galleryicon">
      <img src="../images/thumbs/babycaketopsml.png" alt="Thumbnail 2"/></a>

      <a href="../images/cakes/babycake1.png" class="galleryicon">
      <img src="../images/thumbs/babycakesml.png" alt="Image 1"/></a>
  </div>
  </div>
</div>



 <div class="footer">
  <p>Copyright &copy; 2012 by Mark Webb. All rights reserved.</p>
 </div> <!-- end .footer -->

</div> <!-- end .container -->


 <script type="text/javascript">
 var MenuBar1 = new Spry.Widget.MenuBar("check_menu",{imgDown:"SpryAssets/SpryMenuBarDownHover.gif",   imgRight:"SpryAssets/SpryMenuBarRightHover.gif"});
  </script>

 <script type="text/javascript">

  var _gaq = _gaq || [];
 _gaq.push(['_setAccount', 'UA-29457683-1']);
  _gaq.push(['_trackPageview']);

   (function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') +    '.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();

 </script>


 </body>
</html>
4

7 回答 7

64

You can save the current scroll amount and then set it later:

var tempScrollTop = $(window).scrollTop();

..//Your code

$(window).scrollTop(tempScrollTop);
于 2012-05-31T15:35:40.840 回答
36

For all who came here from google and are using an anchor element for firing the event, please make sure to void the click likewise:

<a  
href='javascript:void(0)'  
onclick='javascript:whatever causing the page to scroll to the top'  
></a>
于 2012-09-01T06:07:50.680 回答
7

Try the code below to prevent the default behaviour scrolling back to the top of the page 

$(document).ready(function() {   
  $('.galleryicon').live("click", function(e) {  // the (e) represent the event
    $('#mainImage').hide();     
    $('#cakebox').css('background-image', "url('ajax-loader.gif')");     
    var i = $('<img />').attr('src',this.href).load(function() {         
      $('#mainImage').attr('src', i.attr('src'));         
      $('#cakebox').css('background-image', 'none');         
      $('#mainImage').fadeIn();     
    });
  e.preventDefault(); //Prevent default click action which is causing the 
  return false;       //page to scroll back to the top
  });  
});

For more information on event.preventDefault() have a look here at the official documentation.

于 2012-05-31T15:29:54.370 回答
4

What you want to do is prevent the default action of the click event. To do this, you will need to modify your script like this:

$(document).ready(function() {
  $('.galleryicon').live("click", function(e) {

    $('#mainImage').hide();
    $('#cakebox').css('background-image', "url('ajax-loader.gif')");
    var i = $('<img />').attr('src',this.href).load(function() {
        $('#mainImage').attr('src', i.attr('src'));
        $('#cakebox').css('background-image', 'none');
        $('#mainImage').fadeIn();
    });
    return false; 
    e.preventDefault();
   });
 });

So, you're adding an "e" that represents the event in the line $('.galleryicon').live("click", function(e) { and you're adding the line e.preventDefault();

于 2012-05-31T15:29:28.083 回答
2

I had a similar problem getting scrollTop to work after reload of div content. The content scrolled to top each time the procedure below was run. I found that a little delay before setting the new scrolltop solved the issue.

This is cut from wdCalendar where I modified this procedure:

 function BuildDaysAndWeekView(startday, l, events, config)
   ....
        var scrollpos = $("#dvtec").scrollTop();
        gridcontainer.html(html.join(""));
        setTimeout(function() {
            $("#dvtec").scrollTop(scrollpos);
        }, 25);
   ....

Without the delay, it simply did not work.

于 2013-05-12T19:51:05.743 回答
0

Something to note, when setting the scroll position, make sure you do it in the correct scope. For example, if you're using the scroll position in multiple functions, you would want to set it outside of these functions.

$(document).ready(function() {
    var tempScrollTop = $(window).scrollTop();
    function example() {
        console.log(tempScrollTop);
    };

});
于 2015-11-26T16:55:40.530 回答
0 
$('html,body').animate({
  scrollTop: $('#answer-<%= @answer.id %>').offset().top - 50
}, 700);
于 2017-11-08T09:23:05.650 回答