$(document).ready(function(){
 
 $('#sign_in').mouseenter(function() {
   $('#sign_in_box').css("visibility","visible");
   $('.log_box').css("visibility","visible");
    });


	
   $('#sign_in').mouseleave(function() {
   $('#sign_in_box').css("visibility","hidden");
     $('.log_box').css("visibility","hidden");
    });
	
   $('#sign_in_box').mouseleave(function() {
   $('#sign_in_box').css("visibility","hidden");
     $('.log_box').css("visibility","hidden");
    });
	
	
  $('#sign_in_box').mouseover(function() {
   $('#sign_in_box').css("visibility","visible");
   $('.log_box').css("visibility","visible");
    }); 
	
});