Jquery $(‘#div’).show().delay(5000).hide(); doesn’t work

Do it like this:

$('#div').show(0).delay(5000).hide(0);

By passing in numbers to .show() and .hide(), jQuery will take those methods into its internal fx queue (even if the number is zero). Since .delay() only works within a queue, you need that little workaround.

example: http://jsfiddle.net/zceKN/