1. nonnegative integer / ^ \ d + $ /
2. positive integer / ^ [0-9] [1-9] [0-9] $ /
3. Non-integer / ^ ((- \ d +) | (0 +)) $ /
4. negative integer / ^ - [0-9] [1-9] [0-9] $ /
5. integer / ^ -? \ D + $ /
6. Non-negative float /^\d+(.\d+)?$/
7. positive浮点number /^(([0-9]Tasu.[0-9] [1-9] [0-9] ) | ([0-9] [1-9] [0-9] . [0-9] Tasu) | ([0-9] [1-9] [0-9] )) $ /
8. Non-positive float /^((-\d+(.\d+)?)|(0+(.0+)?))$/
9.负浮score /^(-(([0-9]Tasu.[0-9] [1-9] [0-9] ) | ([0-9] [1-9] [0-9 ] . [0-9] Tasu) | ([0-9] [1-9] [0-9] ))) $ /
10. Float /^(-?\d+)(.\d+)?$/
11. Digital /^\d+(.{1}\d+)?$/
12. The string consists of the 26 English letters / ^ [A-Za-z] + $ /
13. The string of uppercase letters 26 composed of / ^ [AZ] + $ /
14. The string of 26 lowercase letters consisting of / ^ [az] + $ /
15. The string of numbers and English letters of 26 / ^ [A-Za-z0-9] + $ /
16. The string of digits, letters or underscore 26 composed of / ^ \ w + $ /
17. The string matches all characters composed of single-byte length / ^ [\ x00- \ xff] + $ /
18. The string matches all characters composed of two-byte length / ^ [^ \ x00- \ xff] + $ /
19. A double-byte character string is / [^ \ x00- \ xff] + /
20.email address /^[\w-]+(.[\w-]+)*@[\w-]+(.[\w-]+)+$/
或者 /w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*/21.url address / ^ [A-zA-Z] +: - // (\ W + (\ W +) (. (\ W + (- \ + W)) )) (? \ \ S ) $ /?
或者 /http://([w-]+.)+[w-]+(/[w- ./?%&=]*)?/22. Chinese characters matching the regular / [u4e00-u9fa5] /
23. Match double-byte characters (including characters) / [^ x00-xff] /
应用：计算字符串的长度(一个双字节字符长度计2，ASCII字符计1)
String.prototype.len=function(){
return this.replace([^x00-xff]/g,"aa").length;
}24. regular matching blank line / n [s |] * r /
25. regular HTML tags matching / <(. )>. | <(. *) /> /
26. match trailing spaces regular / (^ S ) | (S $) /
应用：javascript中没有像vbscript那样的trim函数，我们就可以利用这个表达式来实现，如下：
String.prototype.trim = function(){
return this.replace(/(^s*)|(s*$)/g, "");
}27. The matching IP address regular /(d+).(d+).(d+).(d+)/
应用：利用正则表达式匹配IP地址，并将IP地址转换成对应数值的Javascript程序：
function IP2V(ip){
re=/(d+).(d+).(d+).(d+)/g;
if(re.test(ip)){
return RegExp.$1*Math.pow(255,3))+
RegExp.$2*Math.pow(255,2))+
RegExp.$3*255+RegExp.$4*1;
}
else{
throw new Error("Not a valid IP address!");
}
}
其实直接用split函数来分解可能更简单，程序如下：
var ip="10.100.20.168";
ip=ip.split(".");
alert("IP值是："+(ip[0]*255*255*255+ip[1]*255*255+ip[2]*255+ip[3]*1));28. remove the javascript program string of repeating characters
var s="abacabefgeeii";
var s1=s.replace(/(.).*1/g,"$1");
var re=new RegExp("["+s1+"]","g");
var s2=s.replace(re,"");
alert(s1+s2); //结果为：abcefgi
/*使用后向引用取出包括重复的字符，再以重复的字符建立第二个表达式，取到不重复的字符，
两者串连。这个方法对于字符顺序有要求的字符串可能不适用。*/29. The use regular expressions to extract the file name from the URL address javascript program
s="http://www.9499.net/page1.htm";
s=s.replace(/(.*/){0,}([^.]+).*/ig,"$2");
alert(s); //结果为page1
30.限制表单文本框输入内容
只能输入中文：
onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,'')"
onbeforepaste="clipboardData.setData('text',
clipboardData.getData('text').replace(/[^u4E00-u9FA5]/g,''))"
只能输入全角字符：
onkeyup="value=value.replace(/[^uFF00-uFFFF]/g,'')"
onbeforepaste="clipboardData.setData('text',
clipboardData.getData('text').replace(/[^uFF00-uFFFF]/g,''))"
只能输入数字：
onkeyup="value=value.replace(/[^d]/g,'')"
onbeforepaste="clipboardData.setData('text',
clipboardData.getData('text').replace(/[^d]/g,''))"
只能输入数字和英文：
onkeyup="value=value.replace(/[W]/g,'')"
onbeforepaste="clipboardData.setData('text',
clipboardData.getData('text').replace(/[^d]/g,''))"31. Verify that the file names of letters, numbers, down the line composed /^((\w+)(.{1})(\w+))$/
32. match the date (1900-1999)
/^19\d{2}-((0[1-9])|(1[0-2]))-((0[1-9])|([1-2][0-9])|(3([0|1])))$/33. match the date (2000-2999)
/^20\d{2}-((0[1-9])|(1[0-2]))-((0[1-9])|([1-2][0-9])|(3([0|1])))$/34. match date and time
/^(1|2\d{3}-((0[1-9])|(1[0-2]))-((0[1-9])|([1-2][0-9])|(3([0|1]))))( (\d{2}):(\d{2}):(\d{2}))?$/rule
- Integer or decimal:. ^ [0-9] {0,1} + [0-9] {0,2} $
- Enter numbers only: "^ [0-9] * $."
- Only n-bit digital input: "^ \ d {n} $".
- Only input digital bits at least n: "^ \ d {n,} $".
- M ~ n can only enter the number of bits: "^ \ D {m, n} $"
- You can only enter a zero and non-zero number at the beginning: "^ (0 | [1-9] [0-9] *) $".
- There are only two positive real number input decimal: "(. [0-9] {2})? ^ [0-9] + $".
- 1 to enter only three decimal positive real number: "(. [0-9] {1,3})? ^ [0-9] + $".
- You can only enter a non-zero positive integers: "? ^ + [1-9] [0-9] * $."
- You can only enter a non-zero negative integer: "^ - [1-9] [] 0-9" $ *.
- Only 3 of the length of the input characters:. "$ ^ {3}."
- 26 only by the input string of letters in English: "^ [A-Za-z] + $".
- You can only enter a string of 26 English capital letters: "^ [AZ] + $".
- You can only enter letters written by a string consisting of 26 small: "^ [az] + $".
- Only input string of numbers and English letters 26: "^ [A-Za-z0-9] + $".
- You can only enter the numbers, 26 English letters or underscore the string: "^ \ w + $".
- Verify User Password: "^ [a-zA-Z] \ w {5,17} $" The correct format is: begin with a letter, a length between 6 and 18, only contain characters, numbers and underscores.
- Verify that contain ^% & '?,; = $ \ "Characters such as:" [^% &' ',; = $ \ x22?] + ".
- Can input Chinese characters: "^ [\ u4e00- \ u9fa5] {0,} $"
- 验证Email地址："^\w+([-+.]\w+)@\w+([-.]\w+).\w+([-.]\w+)*$"。
- 验证InternetURL："^http://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?$"。
- Verify that the phone number: "^ ((\ d {3,4} -) | \ d {3.4} -) \ d {7,8} $?" The correct format is: "XXX-XXXXXXX", "XXXX- XXXXXXXX" , "XXX-XXXXXXX", "XXX-XXXXXXXX", "XXXXXXX" and "XXXXXXXX".
- ID verification number (15 or 18 digits): "^ \ d {15} | \ d {18} $".
- Verify year 12 months: "^ (0 [1-9] | 1 [0-2]?) $" Correct format: "01" through "09" and "1" to "12."
- Verify month 31 days: "^ (? (0 [1-9]) | ((1 | 2) [0-9]) | 30 | 31) $" correct format; "01" through "09" and "1" to "31." Integer or decimal:. ^ [0-9] {0,1} + [0-9] {0,2} $
- Enter numbers only: "^ [0-9] * $."
- Only n-bit digital input: "^ \ d {n} $".
- Only input digital bits at least n: "^ \ d {n,} $".
- M ~ n can only enter the number of bits: "^ \ D {m, n} $"
- You can only enter a zero and non-zero number at the beginning: "^ (0 | [1-9] [0-9] *) $".
- There are only two positive real number input decimal: "(. [0-9] {2})? ^ [0-9] + $".
- 1 to enter only three decimal positive real number: "(. [0-9] {1,3})? ^ [0-9] + $".
- You can only enter a non-zero positive integers: "? ^ + [1-9] [0-9] * $."
- You can only enter a non-zero negative integer: "^ - [1-9] [] 0-9" $ *.
- Only 3 of the length of the input characters:. "$ ^ {3}."
- 26 only by the input string of letters in English: "^ [A-Za-z] + $".
- You can only enter a string of 26 English capital letters: "^ [AZ] + $".
- You can only enter letters written by a string consisting of 26 small: "^ [az] + $".
- Only input string of numbers and English letters 26: "^ [A-Za-z0-9] + $".
- You can only enter the numbers, 26 English letters or underscore the string: "^ \ w + $".
- Verify User Password: "^ [a-zA-Z] \ w {5,17} $" The correct format is: begin with a letter, a length between 6 and 18, only contain characters, numbers and underscores.
- Verify that contain ^% & '?,; = $ \ "Characters such as:" [^% &' ',; = $ \ x22?] + ".
- Can input Chinese characters: "^ [\ u4e00- \ u9fa5] {0,} $"
- 验证Email地址："^\w+([-+.]\w+)@\w+([-.]\w+).\w+([-.]\w+)*$"。
- 验证InternetURL："^http://([\w-]+\.)+[\w-]+(/[\w-./?%&=]*)?$"。
- Verify that the phone number: "^ ((\ d {3,4} -) | \ d {3.4} -) \ d {7,8} $?" The correct format is: "XXX-XXXXXXX", "XXXX- XXXXXXXX" , "XXX-XXXXXXX", "XXX-XXXXXXXX", "XXXXXXX" and "XXXXXXXX".
- ID verification number (15 or 18 digits): "^ \ d {15} | \ d {18} $".
- Verify year 12 months: "^ (0 [1-9] | 1 [0-2]?) $" Correct format: "01" through "09" and "1" to "12."
- Verify month 31 days: "^ (? (0 [1-9]) | ((1 | 2) [0-9]) | 30 | 31) $" correct format; "01" through "09" and "1" to "31."