How to make an object animation when you hover over it with a cursor?

Here is a good example: Javascript fading - smoothly changing colors or many others on request fade javascript.

Can so

$('#element').click(function() { $('#element2').fadeTo(400, 0.5); }); 

The second element will be assigned a transparency value of 0.5 per 400 milliseconds.

And if you mean a smooth color change to another, then you can use the effect jquery-ui http://jqueryui.com/demos/animate/

You need a color animation plugin. You can take it from there or from here .