Question

I want to style my div using jquery, i want to make it when i click the background become blue, when i unclick(i clicked on other part other than div in my page) the background become red. Sorry for my bad english

Answer 1

With a click handler on document you can capture all the click events, and if the click is not on your div, you can revert to red

$('#yourdiv').click(function() {
   $(this).css('background-color', 'blue');
});

$(document).click(function(e) {
   if(!$(e.target).is('#yourdiv'))
      $('#yourdiv').css('background-color', 'red');
});

See example: http://jsbin.com/oyunin/1/edit