Wednesday, June 11, 2014

Stick Menu top when scrolled content...

<div class="scroller_anchor"></div>
    
<!-- This div will be displayed as fixed bar at the top of the page, when user scrolls -->

<div class="scroller">This is the scrollable bar</div>

<script>

// This function will be executed when the user scrolls the page.
$(window).scroll(function(e) {
    // Get the position of the location where the scroller starts.
    var scroller_anchor = $(".scroller_anchor").offset().top;
    
    // Check if the user has scrolled and the current position is after the scroller's start location and if its not already fixed at the top 
    if ($(this).scrollTop() >= scroller_anchor && $('.scroller').css('position') != 'fixed') 
    {    // Change the CSS of the scroller to hilight it and fix it at the top of the screen.
        $('.scroller').css({
            'background': '#CCC',
            'border': '1px solid #000',
            'position': 'fixed',
            'top': '0px'
        });
        // Changing the height of the scroller anchor to that of scroller so that there is no change in the overall height of the page.
        $('.scroller_anchor').css('height', '50px');
    } 
    else if ($(this).scrollTop() < scroller_anchor && $('.scroller').css('position') != 'relative') 
    {    // If the user has scrolled back to the location above the scroller anchor place it back into the content.
        
        // Change the height of the scroller anchor to 0 and now we will be adding the scroller back to the content.
        $('.scroller_anchor').css('height', '0px');
        
        // Change the CSS and put it back to its original position.
        $('.scroller').css({
            'background': '#FFF',
            'border': '1px solid #CCC',
            'position': 'relative'
        });
    }
});

</script>

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