Search for the phrase SEO myths in Google without quotes and you ll get 243 hits. With all the major search engines keeping their algorithms under lock and key and making modifications without notice it s no wonder that false beliefs get perpetuated. It s time to clear the air....

不相信嗎？

Bill Tancer, the General Manager of Research at Hitwise and one of the keynote speakers at Search Engine Strategies Chicago, will be interviewed by Matt McGowan, Global VP of Marketing at Incisive Media, during an SES Webcast on Friday, Nov. 7, 2008, at 1:00 p.m. EDT / 10:00 a.m. PDT. The title of Bill’s presentation is: “We Are What We Search.” At a time when search engines are rapidly replacing the yellow pages (and news search engines are routinely scooping daily newspapers), Bill has access to a wealth of consumer information about Internet user behavior that was never available before. Bill is well known in the search industry for mining the latest Hitwise data, which is a sample of over 10 million Internet users U.S. and 25 million worldwide, to glean insights on the sites we collectively visit, what we search for and what that tells us about ourselves. I spoke with Bill yesterday and he shared this news nugget with me: “I’m going to talk primarily about what search term data can tell us about the economy and consumer sentiment. I’ll also spend some time on finding insights on the effect of an economic downturn on search. You might expect that with recent contractions in online retail that search traffic to that category would be declining....Our data (while showing a recent small drop-off) indicates that search traffic to retail is up over the previous year....” Bill’s webcast will cover other news-breaking search trends, implications for online advertisers, and he will give Webcast participants opportunities to ask him their most burning search trend questions! Oh, and Bill will give away 10 copies of his latest book, “Click: What Millions of People Are Doing Online and Why It Matters,” to the best questions fielded during the SES Webcast.

最常用的網頁設計有四種選擇方法：Id規則選取，比如 程序代碼button#button{}#urlBar[type=」text」] { }div > p > span#demo{}class規則選取，比如 程序代碼button.toolbarButton { }.fancyText { }menuitem > .menu-left[checked=」true」] { }Tag規則選取，比如 程序代碼td { }div > p { }input[type=」checkbox」] { }統配選擇器，比如 程序代碼*：after[hidden=」true」]他們都是從最右邊開始匹配，直到最左邊整個規則結束。這樣就存在一個問題，比如說最右邊的網頁設計規則已經能確定你要選取到元素。那更多的網頁設計規則匹配就造成了性能上的網頁設計浪費。比如說div > p > span#demo{}div > p > span根本沒有意義。改進：ID是唯一的網頁設計。沒有必要附加多餘的網頁設計規則。也能精準的網頁設計匹配到。 程序代碼button#button{} -> #button{}#urlBar[type=」text」] { } -> #urlBar{}div > p > span#demo{} -> #demo{}下面應該不會出現<a class=」toolbarButton」></a>所以也可以優化。 程序代碼button.toolbarButton { } -> .toolbarButton{}用過多的網頁設計規則，不如直接給元素一個class比如：div > p > span > a{}可能給a一個特殊表現的網頁設計。直接給a寫一個class即可。特殊情況需要特殊對待。比如有時候要保證頁面結構的網頁設計乾淨。以便適用後期改版的網頁設計需要，使用到這種方式。也是可以的網頁設計。平衡取出一個最佳方案。使用繼承 程序代碼#demo .left{text-align:left} ->#demo{text-align:left}註：原文中使用的網頁設計XUL，對沒接觸過XUL的網頁設計同學，可能標籤看起來有點怪，但不難理解。