See the comments for a specific explanation, here is no more nonsense, directly on the code:
/*
function obj$(id) According to the id Get the object
function val$(id) According to the id Get the value of the object
function trim(str) Remove left and right Spaces
function ltrim(str) Delete left space
function rtrim (str) Delete right space
function isEmpty(str) Does the string have a value
function equals(str1, str2) js Determines whether the comparison strings are equal
function equalsIgnoreCase(str1, str2) js Determines whether two strings are equal to each other regardless of case
function isChinese(str) js Judge whether you are Chinese or not
function isEmail(strEmail) js Determine whether or not to email
function isImg(str) js Determines if it is a file in image format jpg|jpeg|swf|gif
function isInteger(str) js To determine whether it is an integer
function isFloat js Determines whether it is a floating point number
function isPost(str) js Determine whether the zip code (1 Places to 6 position
function isMobile(str) js Determine if it's a cell phone number
function isPhone(str) js To determine whether a phone number must contain an area code , You can include an extension
function isQQ(str) js To determine whether or not it is legal QQ number
function isIP(str) js To determine whether it is legal IP
function isDate(str) js Determines whether the date type is ( case :2005-12-12)
function isIdCardNo(idNumber) js A valid identification number
*/
function obj$(id)
{
return document.getElementById(id);
}
function val$(id)
{
var obj = document.getElementById(id);
if(obj !== null)
{
return obj.value;
}
return null;
}
function trim(str)
{
return str.replace(/(^s*)|(s*$)/g, '');
}
function ltrim(str)
{
return str.replace(/^s*/g,'');
}
function rtrim(str)
{
return str.replace(/s*$/,'');
}
function isEmpty(str)
{
if(str != null && str.length > 0)
{
return true;
}
return false;
}
function equals(str1, str2)
{
if(str1 == str2)
{
return true;
}
return false;
}
function equalsIgnoreCase(str1, str2)
{
if(str1.toUpperCase() == str2.toUpperCase())
{
return true;
}
return false;
}
function isChinese(str)
{
var str = str.replace(/(^s*)|(s*$)/g,'');
if (!(/^[u4E00-uFA29]*$/.test(str)
&& (!/^[uE7C7-uE7F3]*$/.test(str))))
{
return false;
}
return true;
}
function isEmail(str)
{
if(/^[w-]+(.[w-]+)*@[w-]+(.[w-]+)+$/.test(str))
{
return true
}
return false;
}
function isImg(str)
{
var objReg = new RegExp("[.]+(jpg|jpeg|swf|gif)$", "gi");
if(objReg.test(str))
{
return true;
}
return false;
}
function isInteger(str)
{
if(/^-?d+$/.test(str))
{
return true;
}
return false;
}
function isFloat(str)
{
if(/^(-?d+)(.d+)?$/.test(str)
{
return true;
}
return false;
}
function isPost(str)
{
if(/^d{1,6}$/.test(str))
{
return true;
}
return false;
}
function isMobile(str)
{
if(/^1[35]d{9}/.test(str))
{
return true;
}
return false;
}
function isPhone(str)
{
if(/^(0[1-9]d{1,2}-)d{7,8}(-d{1,8})?/.test(str))
{
return true;
}
return false;
}
function isQQ(str){
if(/^d{5,9}$/.test(str))
{
return true;
}
return false;
}
function isIP(str){
var reg = /^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0).(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$/;
if(.test(str))
{
return true;
}
return false;
}
function isDate(str)
{
var reg = /^((((1[6-9]|[2-9]d)d{2})-(0?[13578]|1[02])-(0?[1-9]|[12]d|3[01]))|(((1[6-9]|[2-9]d)d{2})-(0?[13456789]|1[012])-(0?[1-9]|[12]d|30))|(((1[6-9]|[2-9]d)d{2})-0?2-(0?[1-9]|1d|2[0-8]))|(((1[6-9]|[2-9]d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))-0?2-29-))$/;
if(reg.test(str))
{
return true;
}
return false;
}
function isIdCardNo(idNumber)
{
var factorArr = new Array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2,1);
var varArray = new Array();
var lngProduct = 0;
var intCheckDigit;
var idNumber.length = ;
if ((idNumber.length != 15) && (idNumber.length != 18))
{
return false;
}
for(i=0;i<idNumber.length;i++)
{
varArray[i] = idNumber.charAt(i);
if ((varArray[i] < '0' || varArray[i] > '9') && (i != 17))
{
return false;
}
else if (i < 17)
{
varArray[i] = varArray[i]*factorArr[i];
}
}
if (idNumber.length == 18)
{
var date8 = idNumber.substring(6,14);
if (checkDate(date8) == false)
{
return false;
}
for(i=0;i<17;i++)
{
lngProduct = lngProduct + varArray[i];
}
intCheckDigit = 12 - lngProduct % 11;
switch (intCheckDigit)
{
case 10:
intCheckDigit = 'X';
break;
case 11:
intCheckDigit = 0;
break;
case 12:
intCheckDigit = 1;
break;
}
if (varArray[17].toUpperCase() != intCheckDigit)
{
return false;
}
}
else
{
var date6 = idNumber.substring(6,12);
if (checkDate(date6) == false)
{
return false;
}
}
return true;
}The functions of common string judgment are basically included. Friends can choose freely according to their own project requirements. If there is anything missing, please leave me a message.