js里的trim的实现，可以trim掉很多字符(zz from:http://www.webtoolkit.info/javascript-trim.html)

function trim(str, chars) {return ltrim(rtrim(str, chars), chars);} function ltrim(str, chars) {chars = chars || "//s";return str.replace(new RegExp("^[" + chars + "]+", "g"), "");} function rtrim(str, chars) {chars = chars || "//s";return str.replace(new RegExp("[" + chars + "]+$", "g"), "");}

这个可以trim掉以下字符

” ” (ASCII 32 (0×20)), an ordinary space空格.

“/t” (ASCII 9 (0×09)), a tab.

“/n” (ASCII 10 (0×0A)), a new line (line feed)换行.

“/r” (ASCII 13 (0×0D)), a carriage return.

“/0″ (ASCII 0 (0×00)), the NUL-byte.

“/x0B” (ASCII 11 (0×0B)), a vertical tab.

 

个人感觉不错，收藏了