我想做一個首屏和第二屏之間滾動鼠標滾輪就可以整平切換的效果，遇到了很多問題，后來在kk的幫助下，終于解決了這個問題，甚是歡喜，于是記錄一下：
我最初的代碼是這樣的：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><style>div {width: 700px;height: 1000px;}.red {background-color: red;}.yellow {background-color: yellow;}</style></head><body><div class="red"> </div><div class="yellow"> </div><div class="red"> </div><div class="yellow"> </div><div class="red"> </div></body><script src="../jQuery/jquery.min.js"></script><script src="test.js"></script></html>$(document).ready(function(){var height = $(window).height(); //獲取瀏覽器窗口當前可見區域的大小 //鼠標滾動之后整屏切換var scrollFunc = function(e){var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;e = e || window.event;if((e.wheelDelta<0|| e.detail>0) && scrollTop>=0 && scrollTop<height){ //不同瀏覽器向下滾動 $(document.body).animate({scrollTop:height}, "fast");$(document.documentElement).animate({scrollTop:height}, "fast");}else if((e.wheelDelta>0 || e.detail<0) && scrollTop>=height && scrollTop<=height+20){ //不同瀏覽器向上滾動$(document.body).animate({scrollTop:0}, "fast");$(document.documentElement).animate({scrollTop:0}, "fast");}}; //注冊事件if(document.addEventListener){document.addEventListener('DOMMouseScroll',scrollFunc,false);}window.onmousewheel = document.onmousewheel = scrollFunc; //IE、chrome、safira});這樣的代碼我在IE和火狐下測試都是正常的，但是在谷歌下onmousewheel事件總是會觸發多次，這是一個極其惱人的事情，為什么會多次觸發呢？經過調試，我發現是我們每次滾動鼠標時都是很“兇殘”的一下子滾動很大一個幅度，而不是一小格一小格的慢慢滾動，這就導致了滾動的時候會多次觸發onmousewheel事件，調用scrollFunc函數，在函數內的animate函數沒有執行完的時候還是不斷的被調用，這樣就會出現滾動多次滾動條滾不下來頁滾不上去的情況。于是，我將上面的js代碼改成了下面這樣：
$(document).ready(function(){var height = $(window).height();var scrollFunc = function(e){document.onmousewheel = undefined;var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;e = e || window.event;if((e.wheelDelta<0|| e.detail>0) && scrollTop>=0 && scrollTop<height){ $(document.body).animate({scrollTop:height}, "fast","linear",function(){document.onmousewheel = scrollFunc;});$(document.documentElement).animate({scrollTop:height}, "fast","linear",function(){document.onmousewheel = scrollFunc;});}else if((e.wheelDelta>0 || e.detail<0) && scrollTop>=height && scrollTop<=height+20){$(document.body).animate({scrollTop:0}, "fast","linear",function(){document.onmousewheel = scrollFunc;});$(document.documentElement).animate({scrollTop:0}, "fast","linear",function(){document.onmousewheel = scrollFunc;});}};if(document.addEventListener){document.addEventListener('DOMMouseScroll',scrollFunc,false);}document.onmousewheel = scrollFunc;});好了，現在的代碼已經能夠正常運行了，不過由于我是一只菜鳥，代碼寫的不夠精致，又被kk說了，在他的提示下，我將冗余的代碼又進行了一番修改：
$(document).ready(function(){var height = $(window).height();var width = $(window).width();var body;if(navigator.userAgent.indexOf("Firefox")>0 || navigator.userAgent.indexOf("MSIE")>0){body = document.documentElement;}else{body = document.body;}var isFinish = true;var scrollFunc = function(e){if(isFinish){var scrollTop = body.scrollTop;e = e || window.event;if((e.wheelDelta<0|| e.detail>0) && scrollTop>=0 && scrollTop<height-20){ scroll(height);}else if((e.wheelDelta>0 || e.detail<0) && scrollTop>=height && scrollTop<=height+20){scroll(0);}}};var scroll = function(height){isFinish = false;$(body).animate({scrollTop:height},"fast","linear",function(){isFinish = true;});};if(navigator.userAgent.indexOf("Firefox")>0){if(document.addEventListener){document.addEventListener('DOMMouseScroll',scrollFunc,false);}}else{document.onmousewheel = scrollFunc;}});終于得到簡介的代碼了，不得不說，通過解決這個問題，還是學到很多的。以后要向著“write less, do more”的目標更加努力了?。?！
如果有哪里寫的不對的，歡迎各位大神們指教，我會虛心學習的。
新聞熱點
疑難解答
