var

 hiddenProperty =

'hidden'

in

 document ?

'hidden'

 :    

'webkitHidden'

in

 document ?

'webkitHidden'

 :    

'mozHidden'

in

 document ?

'mozHidden'

 :    

null

;

var

 visibilityChangeEvent = hiddenProperty.replace(

/hidden/

i,

'visibilitychange'

);

var

 onVisibilityChange =

function

(){

if

 (document[hiddenProperty]) {    

            console.log(

'页面非激活'

);

        }

else

{

            console.log(

'页面激活'

)

        }

    }

    document.addEventListener(visibilityChangeEvent, onVisibilityChange);