<div id="pages"></div>     
    <script>     
    a=location.href;     
    b=a.split('-');     
    c=b.length;     
    d=eval(c-1);     
    e=b[d];     
    f=a.split('-'+e)[0];     
    $('#pages').html('<a id="b" href="'+f+'-'+eval(e-1)+'">Previous</a><span id="i"> | </span><a id="a" href="'+f+'-'+eval(e*1+1)+'">Next</a>');     
    $.ajax({     
    type: 'GET',     
    url: f+'-'+eval(e*1+1),     
    error: function(){$('#a, #i').hide();}     
    });     
    $.ajax({     
    type: 'GET',     
    url: f+'-'+eval(e-1),     
    error: function(){$('#b, #i').hide();}     
    });     
    </script>

<img src="/image.jpg" id="pic$ID$" onclick="change$ID$()"/>
         <img id="second$ID$" src="$RFILE_DIRECT_URL$" style="display:none;"/>
         <img id="first$ID$" src="/imagine.jpg" style="display:none;"/>
js
function change$ID$()
{
        var imag = document.getElementById('pic$ID$').src;
        var img = imag.slice(-3);
        var img1 = document.getElementById('second$ID$').src;
        var imag2 = document.getElementById('first$ID$').src;
            
        if(img == 'gif') {
     document.getElementById('pic$ID$').src=imag2;
        } else {
     document.getElementById('pic$ID$').src=img1;
        }
        }    

.navbar {
color:#ccc;
background:#333;
}
.navbar a:hover {
color:#fff;
background:green;
}