正则表达式中缺少 'XXX'

Language	Message
简体中文	正则表达式中缺少 'XXX'
英文	Expected 'XXX' in regular expression

案例

new RegExp("(");

Browser	Language	Message	Number
IE	简体中文	正则表达式中缺少 ')'	-2146823268
Chrome	英文	Uncaught SyntaxError: Invalid regular expression: /(/: Unterminated group
Firefox		unterminated parenthetical
Opera		RegExp constructor: invalid regular expression
Safari		Invalid regular expression: missing )

new RegExp("[");  // 正则表达式中缺少 ']'

Browser	Language	Message	Number
IE	简体中文	正则表达式中缺少 ']'	-2146823269
Chrome	英文	Invalid regular expression: /[/: Unterminated character class
Firefox		invalid range in character class
Opera		无异常
Safari		Invalid regular expression: mission terminating ] for character class

异常字段	值
Message	正则表达式中缺少 ']'

异常字段	值
Message	Expected ']' in regular expression

异常字段	值
Message	Expected ')' in regular expression