Common JavaScript functions

javascript| function

/***************************************************
* Eo_jslib.js
* JavaScript Regular expression test
*******************************************************/

The checksum is all made up of numbers
function IsDigit (s)
{
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec (s)) return false
return True
}

Verify Login Name: Can only enter 5-20 letters beginning with a letter, can be with numbers, "_", "." The string
function Isregisterusername (s)
{
var patrn=/^[a-za-z]{1} ([a-za-z0-9]|[. _]) {4,19}$/;
if (!patrn.exec (s)) return false
return True
}

Verify user name: You can enter only 1-30 strings that start with a letter
function Istruename (s)
{
var patrn=/^[a-za-z]{1,30}$/;
if (!patrn.exec (s)) return false
return True
}

Verify password: Can only enter 6-20 letters, numbers, underscores
function ispasswd (s)
{
var patrn=/^ (\w) {6,20}$/;
if (!patrn.exec (s)) return false
return True
}

Check ordinary telephone, fax number: You can "+" start, in addition to numbers, can contain "-"
function Istel (s)
{
var patrn=/^[+]{0,1} (\d) {1,3}[]? ([-]? (\d) {1,12}) +$/;
var patrn=/^[+]{0,1} (\d) {1,3}[]? ([-]? ((\d) | []) {1,12}) +$/;
if (!patrn.exec (s)) return false
return True
}

Check mobile phone Number: Must start with a number, in addition to the number, can contain "-"
function Ismobil (s)
{
var patrn=/^[+]{0,1} (\d) {1,3}[]? ([-]? ((\d) | []) {1,12}) +$/;
if (!patrn.exec (s)) return false
return True
}

Check ZIP code
function Ispostalcode (s)
{
var patrn=/^[a-za-z0-9]{3,12}$/;
var patrn=/^[a-za-z0-9]{3,12}$/;
if (!patrn.exec (s)) return false
return True
}

Verify Search Keywords
function Issearch (s)
{
var patrn=/^[^ ' ~!@#$%^&* () +=|\\\][\]\{\}:;\ ' \,.<>/?] {1} [^ ' ~!@$%^& () +=|\\\] [\]\{\}:;\ ' \,.<>?] {0,19}$/;
if (!patrn.exec (s)) return false
return True
}

Function IsIP (s)//by zergling
{
var patrn=/^[0-9.] {1,20}$/;
if (!patrn.exec (s)) return false
return True
}
 
 
/*********************************
* Function:isbetween
* Parameters:val as any value
* Lo as Lower limit to check
* Hi as Hig Her limit to check
* calls:nothing
* returns:true If Val are between Lo and hi both inclusive, otherwise false.
/
Function Isbetween (Val, lo, hi) {
if (Val < lo) | | (val > Hi)) {return (false);}
Else {return (true);}
}

/************************************************
* Function:isdate checks a valid date
* Parameters:thestr as String
* Calls:isbetween, Isint
* Returns:true If THESTR is a valid date otherwise false.
*************************************************/
function IsDate (THESTR) {
var the1st = thestr.indexof ('-');
var the2nd = thestr.lastindexof ('-');

if (the1st = = the2nd) {return (false);}
else {
var y = thestr.substring (0,the1st);
var m = thestr.substring (the1st+1,the2nd);
var d = thestr.substring (the2nd+1,thestr.length);
var maxdays = 31;

If (Isint (m) ==false | | isint (d) ==false | | isint (y) ==false) {
return (false);
Else if (Y.length < 4) {return (false);}
Else if (!isbetween (M, 1,)) {return (false);}
Else if (m==4 | | m==6 | | m==9 | | m==11) maxdays = 30;
Else if (m==2) {
if (y% 4 > 0) maxdays =;
else if (y% = = 0 && y% > 0) maxdays = 28;
Else maxdays = 29;
}
if (Isbetween (d, 1, maxdays) = = False) {return (false);}
Else {return (true);}
}
}
/**********************************************
* Function:iseudate checks a valid date in British Format
* Parameters:thestr as String
* calls:isbetween, isint
* returns:true If THESTR is a valid date Otherwi Se false.
*************************************************/
Function iseudate (thestr) {
If Isbetween ( Thestr.length, 8 () = = False) {return (false);}
Else {
var the1st = thestr.indexof ('/');
var the2nd = thestr.lastindexof ('/');

if (the1st = = the2nd) {return (false);}
else {
var m = thestr.substring (the1st+1,the2nd);
var d = thestr.substring (0,the1st);
var y = thestr.substring (the2nd+1,thestr.length);
var maxdays = 31;

if (Isint (m) ==false | | isint (d) ==false | | isint (y) ==false) {
return (false); }
else if (Y.length < 4) {return (false);}
else if (Isbetween (M, 1,) = = False) {return (false);}
else if (m==4 | | m==6 | | m==9 | | m==11) maxdays = 30;
else if (m==2) {
if (y% 4 > 0) maxdays = 28;
else if (y% = = 0 && y% > 0) maxdays = 28;
else maxdays = 29;
}

if (Isbetween (d, 1, maxdays) = = False) {return (false);}
else {return (true);}
}
}

}
/**************************************************
* Function:compare date! Which is the latest!
* Parameters:lessdate,moredate as String
* Calls:isdate,isbetween
* Returns:true If Lessdate<moredate
****************************************************/
function Iscomdate (lessdate, Moredate)
{
if (!isdate (lessdate)) {return (false);}
if (!isdate (moredate)) {return (false);}
var less1st = lessdate.indexof ('-');
var less2nd = lessdate.lastindexof ('-');
var more1st = moredate.indexof ('-');
var more2nd = moredate.lastindexof ('-');
var Lessy = lessdate.substring (0,less1st);
var LESSM = lessdate.substring (less1st+1,less2nd);
var LESSD = lessdate.substring (less2nd+1,lessdate.length);
var morey = moredate.substring (0,more1st);
var morem = moredate.substring (more1st+1,more2nd);
var mored = moredate.substring (more2nd+1,moredate.length);
var Date1 = new Date (LESSY,LESSM,LESSD);
var Date2 = new Date (morey,morem,mored);
if (Date1>date2) {return (false);}
return (true);

}

/**********************************************
* FUNCTION IsEmpty checks if the parameter is empty or null
* PARAMETER str as String
*************************************************/
function IsEmpty (str) {
if ((str==null) | | (str.length==0)) return true;
else return (false);
}

/***********************************************
* Function:isint
* Parameter:thestr as String
* Returns:true If the passed parameter is an integer, otherwise FALSE
* Calls:isdigit
***************************************************/
function Isint (THESTR) {
var flag = true;

if (IsEmpty (THESTR)) {flag=false;}
Else
{for (var i=0; i<thestr.length; i++) {
if (IsDigit (thestr.substring (i,i+1)) = = False) {
Flag = false; Break
}
}
}
return (flag);
}

/*****************************************************
* Function:isreal
* Parameter:hestr as String
Declen as Integer (how many digits after period)
* Returns:true If Thestr is a float, otherwise FALSE
* Calls:isint
*******************************************************/
function Isreal (THESTR, Declen) {
var dot1st = Thestr.indexof ('. ');
var dot2nd = Thestr.lastindexof ('. ');
var OK = true;

if (IsEmpty (THESTR)) return false;

if (dot1st = = 1) {
if (!isint (THESTR)) return (false);
else return (true);
}

else if (dot1st!= dot2nd) return (false);
else if (dot1st==0) return (false);
else {
var intpart = thestr.substring (0, dot1st);
var Decpart = thestr.substring (dot2nd+1);

if (Decpart.length > Declen) return (false);
else if (!isint (intpart) | | |!isint (DECPART)) return (false);
else if (IsEmpty (Decpart)) return (false);
else return (true);
}
}

/*****************************************************
* Function:isemail
* Parameter:string (Email address)
* Returns:true If the String is a valid e-mail address
* FALSE If the passed string is isn't a valid Email address
* EMAIL FORMAT: anyname@emailserver e.g; webmaster@hotmail.com
* @ sign can appear only once to the email address.
*******************************************************/
function Isemail (THESTR) {
var atindex = thestr.indexof (' @ ');
var dotindex = Thestr.indexof ('. ', Atindex);
var flag = true;
Thesub = thestr.substring (0, dotindex+1)

if ((Atindex < 1) | | (Atindex!= Thestr.lastindexof ('@'))|| (Dotindex< Atindex + 2) | | (Thestr.length <= thesub.length))
{return (false);}
else {return (true);}
}
/********************************************************
* Function:newwindow
* Parameters:doc-> Document to open in the new window
Hite-> Height of the new window
Wide-> Width of the new window
Bars-> 1-scroll bars = YES 0-scroll bars = NO
Resize-> 1-resizable = YES 0-resizable = NO
* Calls:none
* Returns:new Window instance
*************************************************************/
function NewWindow (doc, Hite, wide, bars, resize) {
var winnew= "_blank";
var opt= "toolbar=0,location=0,directories=0,status=0,menubar=0,";
opt+= ("scrollbars=" +bars+ ",");
opt+= ("resizable=" +resize+ ",");
opt+= ("width=" +wide+ ",");
opt+= ("height=" +hite);
Winhandle=window.open (doc,winnew,opt);
Return
}
/***********************************************************
* Function:decimalformat
* Parameters:paramvalue-> Field value
* Calls:none
* Returns:formated String
***************************************************************/
function DecimalFormat (paramvalue) {
var Intpart = parseint (paramvalue);
var decpart =parsefloat (paramvalue)-Intpart;

str = "";
if ((decpart = 0) | | (Decpart = null)) STR + + (Intpart + ". 00");
else str = (Intpart + decpart);

return (str);
}

^\\d+$//non-negative integer (positive integer + 0)
"^[0-9]*[1-9][0-9]*$"//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 number + 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]+$ '//26 English letters
^[a-z]+$///26-Letter uppercase String
"^[a-z]+$"///26-Letter lowercase string
"^[a-za-z0-9]+$"//by number and 26 English-letter strings
" ^\\w+$ "///a string consisting of numbers, 26 English letters, or underscores
^[\\w-]+ ( \\.[ \\w-]+) *@[\\w-]+ (\\.[ \\w-]+) +$ "//email address
" ^[a-za-z]+://( \\w+ (-\\w+) *) (\ \\w+ (-\\w+) *)) * (\\?\\s*) $ "//url