js中一些常用的正则表达式收藏

/*
*remove all blanks
*trim(" df ") =df
*add by tony
*/
function trim(str) {
    return str.replace(/(^\s*)|(\s*$)/g, "");
}

/*
*Round real
*Round(58.2385, 2) =58.24
*add by tony
*/
function Round(a_Num, a_Bit) {
    return (Math.round(a_Num * Math.pow(10, a_Bit)) / Math.pow(10, a_Bit));
}

/*
*validate 0 or 5 bit Number(Integer)
*isValidInteger("d") = fase
*isValidInteger("2") = true
*add by tony
*/
function isValidInteger(sText) {
var reg = /^[0-9]{0,5}$/;
    return reg.test(sText);
}

/*
*split text from text-value
*splitValue("ddd-fff") =ddd
*add by tony
*/
function splitText(value){
var temp = new Array();
temp = value.split("$");
return temp[0];
}

/*
*split value from text-value
*splitValue("ddd-fff") =fff
*add by tony
*/
function splitValue(value){
var temp = new Array();
temp = value.split("$");
return temp[1];
}

/* 校验是否全由数字组成 */
function isDigit(s) {
var patrn=/^[0123456789１２３４５６７８９０]+$/;
if (!patrn.exec(s)) return false
return true
}

/*
* 全角转半角
* add by tony
*/
function DBC2SBC(str)
{
var result = '';
for (i=0 ; i<str.length; i++){
  code = str.charCodeAt(i);//获取当前字符的unicode编码
  if (code >= 65281 && code <= 65373){//在这个unicode编码范围中的是所有的英文字母已经各种字符
   result += String.fromCharCode(str.charCodeAt(i) - 65248);//把全角字符的unicode编码转换为对应半角字符的unicode码
  }else if (code == 12288) {//空格
   result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);
  }else {
   result += str.charAt(i);
  }
}
return result;
}

/************************************************
DESCRIPTION: Validates that a string contains only
    valid integer number.
PARAMETERS:
   strValue - String to be tested for validity
RETURNS:
   True if valid, otherwise false.
  
Add by tonylee
**************************************************/
function validateInteger( strValue ) {
  var objRegExp  = /(^-?\d\d*$)/;
  //check for integer characters
  return objRegExp.test(strValue);
}

/*****************************************************************
DESCRIPTION: Validates that a string contains only valid numbers.
PARAMETERS:
   strValue - String to be tested for validity
RETURNS:
   True if valid, otherwise false.
  
Add by tonylee
******************************************************************/
function  validateNumeric( strValue ) {
  var objRegExp  =  /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/;
  //check for numeric characters
  return objRegExp.test(strValue);
}

/************************************************
DESCRIPTION: Validates that a string contains a
  valid email pattern.
PARAMETERS:
   strValue - String to be tested for validity
RETURNS:
   True if valid, otherwise false.
REMARKS: Accounts for email with country appended
  does not validate that email contains valid URL
  type (.com, .gov, etc.) or valid country suffix.
 
Add by tonylee
*************************************************/
function validateEmail( strValue) {
var objRegExp  = /(^[a-z]([a-z_\.]*)@([a-z_\.]*)([.][a-z]{3})$)|(^[a-z]([a-z_\.]*)@([a-z_\.]*)(\.[a-z]{3})(\.[a-z]{2})*$)/i;
  //check for valid email
  return objRegExp.test(strValue);
}

/************************************************
DESCRIPTION: Validates that a string contains valid
  US phone pattern.
  Ex. [phone] or [phone]
PARAMETERS:
   strValue - String to be tested for validity
RETURNS:
   True if valid, otherwise false.
  
Add by tonylee
*************************************************/
function validateUSPhone( strValue ) {
  var objRegExp  = /^\([1-9]\d{2}\)\s?\d{3}\-\d{4}$/;
  //check for valid us phone with or without space between area code
  return objRegExp.test(strValue);
}

/************************************************
DESCRIPTION: Validates that a string is not all
  blank (whitespace) characters.
PARAMETERS:
   strValue - String to be tested for validity
RETURNS:
   True if valid, otherwise false.
  
Add by tonylee
*************************************************/
function validateNotEmpty( strValue ) {
   var strTemp = strValue;
   strTemp = trimAll(strTemp);
   if(strTemp.length > 0){
     return true;
   }
   return false;
}

/************************************************
DESCRIPTION: Trims trailing whitespace chars.
PARAMETERS:
   strValue - String to be trimmed.
RETURNS:
   Source string with right whitespaces removed.
  
Add by tonylee
*************************************************/
function rightTrim( strValue ) {
var objRegExp = /^([\w\W]*)(\b\s*)$/;
    if(objRegExp.test(strValue)) {
       //remove trailing a whitespace characters
       strValue = strValue.replace(objRegExp, '$1');
    }
  return strValue;
}

/************************************************
DESCRIPTION: Trims leading whitespace chars.
PARAMETERS:
   strValue - String to be trimmed
RETURNS:
   Source string with left whitespaces removed.
  
Add by tonylee
*************************************************/
function leftTrim( strValue ) {
var objRegExp = /^(\s*)(\b[\w\W]*)$/;
    if(objRegExp.test(strValue)) {
       //remove leading a whitespace characters
       strValue = strValue.replace(objRegExp, '$2');
    }
  return strValue;
}

/************************************************
DESCRIPTION: Removes leading and trailing spaces.
PARAMETERS: Source string from which spaces will
  be removed;
RETURNS: Source string with whitespaces removed.

Add by tonylee
*************************************************/
function trimAll( strValue ) {
var objRegExp = /^(\s*)$/;
    //check for all spaces
    if(objRegExp.test(strValue)) {
       strValue = strValue.replace(objRegExp, '');
       if( strValue.length == 0)
          return strValue;
    }
   //check for leading & trailing spaces
   objRegExp = /^(\s*)([\W\w]*)(\b\s*$)/;
   if(objRegExp.test(strValue)) {
       //remove leading and trailing whitespace characters
       strValue = strValue.replace(objRegExp, '$2');
    }
  return strValue;
}