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---

1+2+3,false
(1+2+3),true
(1+2+3.),false
(.1+2+3),false
(1.2+2.3+3),true
(1+2+3..2),false
(12++0+3),false
1(1+0+3),false

---

try...

JScript code:
var reg = /^\(([1-9][0-9]*(\.[0-9]*)?\+){2}[1-9][0-9]*(\.[0-9]*)?\)$/;

---

ÒýÓÃ

1+2+3,false
(1+2+3),true
(1+2+3.),false
(.1+2+3),false
(1.2+2.3+3),true
(1+2+3..2),false
(12++0+3),false
1(1+0+3),false

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ÒýÓÃ

try...

JScript codevar reg=/^\(([1-9][0-9]*(\.[0-9]*)?\+){2}[1-9][0-9]*(\.[0-9]*)?\)$/;

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