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.

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  个人感觉不错，收藏了