JavaScript determines the scroll of the mouse wheel up and down

Share a JS implementation to determine the mouse wheel scroll up and down:

1 <Scripttype= "Text/javascript">  2         varScrollfunc= function(e) {3 e=e||window.event; 4         if(E.wheeldelta) {//Judging browser ie, Google pulley events5             if(E.wheeldelta> 0) { //When the pulley is rolling up6 Alert ("Pulley Roll Up"); 7             }  8             if(E.wheeldelta< 0) { //When the pulley is rolling down9 Alert ("Pulley Scroll down"); Ten             }   One         } Else if(e.detail) {//Firefox pulley events A             if(E.detail> 0) { //When the pulley is rolling up - Alert ("Pulley Roll Up");  -             }   the             if(E.detail< 0) { //When the pulley is rolling down - Alert ("Pulley Scroll down");  -             }   -         }   +     }   -     //to bind a page to a pulley scroll event +     if(document.addeventlistener) {//Firefox A Document.addeventlistener ('Dommousescroll', Scrollfunc,false);  at     }   -     //rolling pulley triggering Scrollfunc method//ie Google - Window.onmousewheel=Document.onmousewheel=Scrollfunc;  -     </Script> 

JavaScript determines the scroll of the mouse wheel up and down