a === b; // true 1/a !== 1/b; // true
a = b = {}; alert([a === b, 1/a !== 1/b]);
alert(typeof $)
a = 0; b = -0; alert( a === b ) alert( 1/a !== 1/b )
a = 'a'; b = 'a'; alert( a === b ) alert( 1/a !== 1/b )