A simple example of scrolling event bindings for JS Mouse pulleys

  This article mainly introduces a simple example of a JS mouse pulley scrolling Event binding (compatible with mainstream browsers). Need friends can come to the reference, I hope to help you.

  Code as follows:/** event handler for mouse wheel event.           * Mouse scrolling event            */          var wheel = function (event) {              var delta = 0;               if (!event) * for IE. *                   event = window.event;               if (Event.wheeldelta) {/* ie/opera. */        &NBSP ;         delta = event.wheeldelta/120;              } else if (event.detail) {            &NBS P    /** Mozilla case. *            ,      /** in Mozilla, sign of Delta are different than in IE.&N Bsp                  * Also, Delta is multiple of 3.                   */                & nbsp Delta =-EVENT.DETAIL/3;              /**               If Delta is Nonzer O, handle it.               * Basically, Delta is now positive if wheel was scroll Ed up,               * and negative, if wheel was scrolled down.    &NBS P          */              if (Delta)       &NBS P           handle (delta);              /** prevent default actions caused by mouse wheel.      &N Bsp        * that might to ugly, but we handle scrolls somehow            &N Bsp  * anyway, so don ' t bother here.               */              if (Event.preventdefau LT)                   Event.preventdefault ();               Event.returnvalue = false;           {           /** initialization code.            * If your own event management code, change it as required.           */          if (Window.addeventlistener) {      &NBSP ;      /** Dommousescroll is for Mozilla. *               Window.addeventlistener (' Dommousescroll ', wheel, false);           {         /** Ie/opera. *           Window.onmousewheel = Document.onmousewheel = wheel;            /** this are high-level function.           * It must react to Delta Bei Ng more/less than zero.           */          var handle = Functio N (Delta) {              var random_num = Math.floor (Math.random () * +); &nbsp ;             if (Delta < 0) {                &NBS P Alert ("Mouse pulley scrolling down: + Delta +" Times!) "); 1                   $ ("Btn_next_pic"). OnClick (Random_num);                   return;              } else {                 / /alert ("Mouse pulley scrolling up:" + Delta + "Times!") "); -1                   $ ("Btn_last_pic"). OnClick (Random_num);       &nbsp           return;               {         }