Regular expression to validate numbers

Regular expression to validate numbers

Verification Number: ^[0-9]*$

To verify N-bit numbers: ^\d{n}$

Verify that at least n digits: ^\d{n,}$

Verify the number of m-n bits: ^\d{m,n}$

Verify numbers starting with 0 and non 0: ^ (0|[ 1-9][0-9]*) $

Verify that there is a positive real number with two decimal places: ^[0-9]+ (. [ 0-9]{2})? $

Verify that there is a positive real number with 1-3 decimal places: ^[0-9]+ (. [ 0-9]{1,3})? $

Verify non-zero positive integers: ^\+? [1-9] [0-9]*$

To verify a nonzero negative integer: ^\-[1-9][0-9]*$

Validates non-negative integers (positive integers + 0) ^\d+$

Validates a non-positive integer (negative integer + 0) ^ ((-\d+) | ( 0+)) $

Verify the character with a length of 3: ^. {3}$

Validates a string consisting of 26 English letters: ^[a-za-z]+$

Validates a string consisting of 26 uppercase English letters: ^[a-z]+$

Validates a string consisting of 26 lowercase English letters: ^[a-z]+$

Validates a string consisting of a number and 26 English letters: ^[a-za-z0-9]+$

Validates a string consisting of a number, 26 letters, or underscores: ^\w+$

Verify user password: ^[a-za-z]\w{5,17}$ the correct format is: Start with a letter, the length is between 6-18, and can contain only characters, numbers, and underscores.

Verify that it contains ^%& ',; =?$\ ' characters:[^%& ', =?$\x22]+

Verify Kanji: ^[\u4e00-\u9fa5],{0,}$

Verify email Address: ^\w+[-+.] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *$

Verify interneturl:^http://([\w-]+\.) +[\w-]+ (/[\w-./?%&=]*)? $; ^[a-za-z]+://(w+ (-w+) *) (. ( w+ (-w+) *) * (? s*)? $

Verify the phone number: ^ (\ (\d{3,4}\) |\d{3,4}-)? \d{7,8}$:--the correct format is: xxxx-xxxxxxx,xxxx-xxxxxxxx,xxx-xxxxxxx,xxx-xxxxxxxx,xxxxxxx, XXXXXXXX.

Verify your Social Security number (15-bit or 18-digit number): ^\d{15}|\d{}18$

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

Verify one months of 31 days: ^ ((0?[ 1-9]) | ((1|2) [0-9]) |30|31) $ The correct format is: 01, 09 and 1, 31.

Integer: ^-?\d+$

Non-negative floating-point number (positive floating point + 0): ^\d+ (\.\d+)? $

Positive floating-point number ^ ([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)) $

Non-positive floating-point number (negative floating point + 0) ^ ((-\d+ (\.\d+)?) | (0+ (\.0+)?)) $

Negative floating-point number ^ (-([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*))) $

Floating point ^ (-?\d+) (\.\d+)? $

Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

The following untested, please verify after use

1. Enter only numbers and English:

<input onkeyup= "Value=value.replace (/[\w]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "id=" Text1 "name=" Text1 ">

2. Only numbers can be entered:

<input onkeyup= "Value=value.replace (/[^\d]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "id=" Text2 "name=" Text2 ">

3. Only full-width input:

<input onkeyup= "Value=value.replace (/[^\uff00-\uffff]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\uff00-\uffff]/g, ') "id=" Text3 "name=" Text3 ">

4. Only the Chinese characters can be entered:

<input onkeyup= "Value=value.replace (/[^\u4e00-\u9fa5]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\u4e00-\u9fa5]/g, ') "id=" Text4 "name=" TEXT4 ">

5. Email Address verification:

var Regu = "^ (([0-9a-za-z]+) | ( [0-9a-za-z]+[_.0-9a-za-z-]*[0-9a-za-z]+) @ ([a-za-z0-9-]+[.]) + ([a-za-z]{2}|net|net|com|com|gov|gov|mil|mil|org|org|edu|edu|int|int) $ "

var re = new RegExp (Regu);

if (S.search (re)! =-1) {

return true;

} else {

Window.alert ("Please enter a valid legal e-mail address!") ")

return false;

}

6. Identity card:

"^\\d{17} (\\d|x) $"

7.17 Regular Expressions

"^\\d+$"//nonnegative integer (positive integer + 0)

"^[0-9]*[1-9][0-9]*$"//Positive integer

"^ ((-\\d+) | (0+)) $ "//non-positive integer (negative integer + 0)

"^-[0-9]*[1-9][0-9]*$"//Negative integer

"^-?\\d+$"//Integer

"^\\d+ (\\.\\d+)? $"//non-negative floating-point number (positive floating point + 0)

^ ([0-9]+\\]. [0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\\. [0-9]+) | ([0-9]*[1-9][0-9]*)) $ "//positive floating-point number

"^ ((-\\d+ (\\.\\d+)?) | (0+ (\\.0+)?)) $ "//non-positive floating-point number (negative floating-point number + 0)

^ (-([0-9]+\\]. [0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\\. [0-9]+) | ([0-9]*[1-9][0-9]*))) $ "//negative floating-point number

^ (-?\\d+) (\\.\\d+)? $ "//floating-point number

"^[a-za-z]+$"//A string consisting of 26 English letters

"^[a-z]+$"//A string consisting of 26 uppercase letters in English

"^[a-z]+$"//String consisting of 26 English letters in lowercase

"^[a-za-z0-9]+$"//string consisting of a number and 26 English letters

"^\\w+$"//A string consisting of numbers, 26 letters or underscores

"^[\\w-]+ (\\.[ \\w-]+) *@[\\w-]+ (\\.[ \\w-]+) +$ "//email address

"^[a-za-z]+://(\\w+ (-\\w+) *) ( \\w+ (-\\w+) *) * (\\?\\s*)? $ "//url

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1. The dashed box when the button is pressed

Add attribute value Hidefocus or hidefocus=true in input

2. Read-only text box contents

Add the attribute value in input readonly

3. Prevent the text document from being emptied (you can use the style content as a class reference)

<input Style=behavior:url (#default #savehistory); Type=text id=opersistinput>

4.ENTER key to move the cursor to the next input box

<input onkeydown= "if (event.keycode==13) event.keycode=9" >

5. Only Chinese (with flashing)

<input onkeyup= "value="/value.replace (/["-~]/g,") "onkeydown=" if (event.keycode==13) event.keycode=9 ">

6. Only digital (with flashing)

<input onkeyup= "value="/value.replace (/["^\d]/g,") "Onbeforepaste=" Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ')) ">

7. Only digital (no flashing)

<input ime-mode:disabled "onkeydown=" if (event.keycode==13) event.keycode=9 "onkeypress=" if ((event.keyCode<48 || event.keycode>57)) Event.returnvalue=false ">

8. Only input English and numerals (with flashing)

<input onkeyup= "value="/value.replace (/[\w]/g, "')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ')) ">

9. Shielding Input Method

<input type= "text" name= "url" ime-mode:disabled "onkeydown=" if (event.keycode==13) event.keycode=9 ">

10. Enter only digits, decimal point, minus (-) character (no flashing)

<input onkeypress= "if (event.keycode!=46 && event.keycode!=45 && (event.keycode<48 | | event.keycode>57)) Event.returnvalue=false ">

11. Only two decimal places can be entered, three decimal places (with flashing)

<input maxlength=9 onkeyup= "if (Value.match (/^\d{3}$/)) value="/value.replace (Value,parseint (VALUE/10)) "; value= "/value.replace (/\.\d*\./g, '." ') "onkeypress=" if ((event.keycode<48 | | event.keycode>57) && event.keycode!=46 && event.keycode!=45 | | Value.match (/^\d{3}$/) | | /\.\d{3}$/.test (value)) {Event.returnvalue=false} "Id=text_kfxe name=text_kfxe>

Regular expression to validate numbers