????最初目的：將html頁面公共部分提取出來，如：導航，底部footer;然后在其它頁面調用;便于后期字段上的更改; ???? ???? ????將頁面導航的html代碼，另存為一個nav.html文件;然后index.html頁面要用導航時，用jquery?load();方法來調用這個nav.html; ???? ????問題是： ???? ????????在搭建的后臺環境?localhost下??調用成功??能正常顯示頁面; ???????? ???????? ????????但在本地?file:///D:/www/project08/index.html?調用失敗??不能顯示調用的頁面; ???????? ???????? ????瀏覽器報錯： ???? ??????????1.??Failed?to?load?resource:?No?'Access-Control-Allow-Origin'?header?is?present?on?the?requested?resource.?Origin?'null'?is?therefore?not?allowed?access.? ???????? ??????????2.?XMLHttpRequest?cannot?load?file:///D:/www/project08/nav.html.?No?'Access-Control-Allow-Origin'?header?is?present?on?the?requested?resource.?Origin?'null'?is?therefore?not?allowed?access. ???????? ????請問大神： ???? ????????這是為什么？？？