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Possible Duplicate:
How do I trim a string in javascript?
我只需要从通用字符串中删除最后一个和第一个空格。
例子:
var str = " hello world "; // become "hello world"
var str = "ehi, do you come from ? "; // become "ehi, do you come from ?"
var str = "I am from Cina"; // remain "I am from Cina"
我该怎么做?