Question

I want to add css top position relatively.
if its top position is 30px, I want to add its position +30,
so its result is 60px.

so I have to do this like this,

$("#btn").css("top", $("#btn").css("top")+30);

is there any shorter way or effecient way to do this.

Answer 1

If you want you can use the .animate() method which allows increments, and use 0 as duration so that it occurs instantly.

$('#btn').animate({top:'+=10'},0);

example at http://www.jsfiddle.net/gaby/Pre8A/1/