href=""> ! var img = new Image(); img.src = ""; ! Empty image src can destroy your site http://www.nczonline.net/blog/2009/11/30/empty-image-src-can- destroy-your-site/
Don't use classes or IDs with elements (a.foo or a#foo). (overqualified-elements) a.activeෆཁʹৄࡉ͕૿͍ͯ͠ΔηϨΫλͰ ͢ɻ.activeͱ͠ɺλάʹґଘ͠ͳ͍Α͏ʹ͠· ͠ΐ͏ɻηϨΫλʹIDΛ༻͢ΔͷΊ·͠ΐ ͏ɻ
= new Array("foo", "bar"); // ["foo", "bar"] ! var array3 = new Array(3); // [] and array3.length is 3 var array1 = ["foo"]; // ["foo"] ! var array2 = ["foo", "bar"]; // ["foo", "bar"] ! var array3 = [undefined, undefined, undefined]; // [] and array3.length is 3 ʮObjectͬͱΘ͔Γʹ͍͘ͷͰׂѪ…ɻʯ