摘要：
javascript<script> window.onload = function(){ var count = 0; document.onmousewheel = function(e){ /*鼠标滚动的量 下滚是负 上滚是正*/ if(e.wheelDelta < 0){ count ++ 阅读全文
摘要：
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, 阅读全文