Regular Expression Verification

Only numbers are allowed: "^ [0-9] * $ ".

You can only enter n digits: "^" d {n} $ ".

You can only enter at least n digits: "^" d {n,} $ ".

Only m ~ can be input ~ N-digit :. "^" D {m, n} $"

Only numbers starting with zero and non-zero can be entered: "^ (0 | [1-9] [0-9] *) $ ".

Only positive numbers with two decimal places can be entered: "^ [0-9] + (. [0-9] {2 })? $ ".

Only 1 ~ Positive number of three decimal places: "^ [0-9] + (. [0-9] {1, 3 })? $ ".

Only a non-zero positive integer can be entered: "^" +? [1-9] [0-9] * $ ".

You can only enter a non-zero negative integer: "^"-[1-9] [] 0-9 "* $.

Only 3 characters can be entered: "^. {3} $ ".

You can only enter A string consisting of 26 English letters: "^ [A-Za-z] + $ ".

You can only enter a string consisting of 26 uppercase letters: "^ [A-Z] + $ ".

You can only enter a string consisting of 26 lower-case English letters: "^ [a-z] + $ ".

You can only enter a string consisting of a number and 26 English letters: "^ [A-Za-z0-9] + $ ".

You can only enter a string consisting of digits, 26 English letters, or underscores: "^" w + $ ".

Verify the User Password: "^ [a-zA-Z]" w {5, 17} $ ". The correct format is: start with a letter, with a length of 6 ~ It can only contain characters, numbers, and underscores.

Check whether ^ % & ',; =? $ "" And other characters: "[^ % & ',; =? $ "X22] + ".

Only Chinese characters can be entered: "^ [" u4e00-"u9fa5] {0,} $"

Verify Email address: "^" w + ([-+.] "w +) * @" w + ([-.] "w + )*". "w + ([-.] "w +) * $ ".

Verify InternetURL: "^ http: // ([" w-] + ".) + [" w-] + (/["w -./? % & =] *)? $ ".

Verification phone number: "^ (" ("d {3, 4}-) |" d {3.4 }-)? "D {7,8} $" correct format: "XXX-XXXXXXX", "XXXX-XXXXXXXX", "XXX-XXXXXXX", "XXX-XXXXXXXX", "XXXXXXX" and "XXXXXXXX ".

Verify the ID card number (15 or 18 digits): "^" d {15} | "d {18} $ ".

12 months of verification: "^ (0? [1-9] | 1 [0-2]) $ "the correct format is:" 01 "~ "09" and "1 "~ "12 ".

31 days of verification for a month: "^ (0? [1-9]) | (1 | 2) [0-9]) | 30 | 31) $ "the correct format is;" 01 "~ "09" and "1 "~ "31 ".

Use regular expressions to restrict text box input in a webpage form:

You can only enter Chinese characters using regular expressions: onkeyup = "value = value. replace (/[^ "u4E00-" u9FA5]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ "u4E00-" u9FA5]/g ,''))"

You can only enter the full-width characters: onkeyup = "value = value. replace (/[^ "uFF00-" uFFFF]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ "uFF00-" uFFFF]/g ,''))"

Use a regular expression to limit that only numbers can be entered: onkeyup = "value = value. replace (/[^ "d]/g,'') "onbeforepaste =" clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ "d]/g ,''))"

You can only enter numbers and English letters using regular expressions: onkeyup = "value = value. replace (/["W]/g,'') "onbeforepaste =" clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ "d]/g ,''))"