Question

I’ve an image inside a div, and the following Javascript code:

function animate_down(key1, key2) 
{
   cimage = document.getElementById('sslot_img' + key1);
   var topval = cimage.offsetTop;
   if (topval == -416) {
        cimage.animate({ top: '0px' }, 5000);
   }
   else {
        topval = topval - 32;
        var toptxt = { 'top': topval.toString() };
        cimage.animate(toptxt, 5000);
    }
}

I’ve test it in Firebug, when the debugger reaches .animate function it’s throwing :

cimage.animate is not a function 

what am i missing?

Answer 1

getElementById is not a jQuery function, and will not yield a jQuery object. animate is only available on jQuery objects. You need to either wrap your cimage:

$(cimage).animate( ... )

or fetch it through jQuery rather than getElementById

var cimage = $('#sslog_img' + key1);

Note that if you go with the latter option, cimage will not have an offsetTop property, but rather, you’d have to use

cimage.offset().top

or

cimage[0].offsetTop