Web Development: December 2009

Friday, December 11, 2009

JavaScript Enum

JavaScript Enum variable enables you to create the collection of integer based constant values. In this sample we will learn the different type of JavaScript Enum variable syntaxes and retrieving their integer values using special way to get Enum items. Try the sample code below:
<html>
<head>

    <title>Creating Javascript Enum Items</title>

</head>
<body onload="Enum()">

    <script type="text/javascript">

    var Days = {"sunday" : 0, "monday" : 1, "tuesday" : 3, "wednesday" : 4, "thursday" : 5, "friday" : 6, "saturday" : 7};

    document.write("<b>Day Names Enumerator=</b> " + Days.friday + "<br />");

    /************************************************************/

    function Enum() {}

    Enum.ColorType = {red:0, blue:1, green:2}

    document.write("<b>Enum Function=</b> " + Enum.ColorType.blue + "<br />");

    /************************************************************/

    var enumObj = new Object();

    enumObj.fontSize = {small:10, medium:12, large:14}

    document.write("<b>Enum Object=</b> " + enumObj.fontSize.small + "<br />");

    </script>

</body>
</html>

--
ఇట్లు మీ,
చంద్రశేఖర్.

JavaScript Array Object

JavaScript array object allows you to store the multiple values of similar datatype into a single variable. JavaScript Array stores the items at different consecutive index numbers that can be retrieved using JavaScript For loop very easily. In this sample we will learn and practive the different types of JavaScript Array declarations for example dynamic array and length bound array. Now lets the execute the code given in the sample below:
<html>
<head>
    <title>Javascript Array</title>
</head>
<body>

    <script language="javascript" type="text/javascript">

    // Array having dynamic length
    var myArr1 = new Array();
    myArr1[0] = "John";
    myArr1[1] = "Tim";
    myArr1[2] = "Smith";
    myArr1[3] = "Jack";

    document.write("<b>myArr1, Value at index 3 =</b> " + myArr1[3]);
    document.write("<br /><br />");

    // Array having fixed size i.e. 3
    var myArr2 = new Array(3);
    myArr2[0] = "John";
    myArr2[1] = "Tim";
    myArr2[2] = "Smith";

    document.write("<b>myArr2, Value at index 0 =</b> " + myArr2[0]);
    document.write("<br /><br />");

    // inline Array items
    var myArr3 = new Array( "John", "Smith", "Tim");

    document.write("<b>myArr3, Value at index 2 =</b> " + myArr3[2]);
    document.write("<br /><br />");

    // Value overwriting at Array index by re-assigning values
    myArr3[2] = "Jackson";

    document.write("<b>myArr3, New value at index 2 =</b> " + myArr3[2]);
    document.write("<br />");

    </script>

</body>
</html>

--
ఇట్లు మీ,
చంద్రశేఖర్.

Javascript Array

In JavaScript you can also use Arrays likewise in other programming languages, to store the set of values of same datatype in a single variable. To define an Array in JavaScript new Keyword is used.

In JavaScript you can define arrays in two ways. First by leaving the array size blank that allows it to define its size automatically. If you leave the array size undefined, then you add as many values at different index of array. In second way you can define the size of array by passing the integer value for proper memory allocation.

Syntax1:

var myArr = new Array();

Syntax2:

var myArr = new Array(5);

Also note that if you have defined the array size then you can add values for the array indexes 0 to 4.

Example for array having no size define:

var myArr = new Array();

myArr[0] = "John";

myArr[1] = "Tim";

myArr[2] = "Smith";

myArr[3] = "Jack";

Example for array having size limit defined:

var myArr = new Array(3);

myArr[0] = "John";

myArr[1] = "Tim";

myArr[2] = "Smith";

One another way of defining an Array in JavaScript:

var myArr = new Array( "John", "Smith", "Tim");

Now you have learnt how to define the arrays in JavaScript, then why to waste time for searching here and there to learn how to display the values stored at the different indexes of array.

You can directly call the array values by passing the specific index of the array: alert(myArr[0]);

Above code will display the value stored at the first i.e. 0th index of array.

If you have passed the two different values for the same index of an Array then calling that particular index will return the last value stored in it.

E.g.:

var myArr = new Array();

myArr[0] = "John";

myArr[1] = "Smith";

myArr[0] = "Tim";

alert(myArr[0]);

Above code will display the value "Tim" for 0th index.

You can also use the JavaScript for loop to read the each value in sequence from 0th to the last index of array.

Output:

You can see the output of above discussed codes from the following link:

JavaScript Array Object

Learn from JavaScript split function to convert the string into array and read the array values by using for loop in javascript.

--
ఇట్లు మీ,
చంద్రశేఖర్.

SubString String Function 01

JavaScript Substring function returns the part of the provided string starting from the specified index. By default JavaScript substring function returns the substring starting from the specified index to the end of provided string. Lets try the following sample code to understand the functionality:
<html>
<head>
<title>Javascript Substring String Function 01</title>
</head>
<body>

<script type="text/javascript">

var myString = new String();
myString = "JavaScript SubString";

document.write(myString.substring(11));

</script>

</body>
</html>
JavaScript Substr function returns the part of the provided string starting from the specified starting index. By default JavaScript substr function returns the sub string starting from the specified starting index to the end of provided string. Lets try the following sample code to understand the functionality:
<html>
<head>
<title>Javascript Substr String Function 01</title>
</head>
<body>

<script type="text/javascript">

var myString = new String();
myString = "JavaScript Substr Sample";

document.write(myString.substr(11));

</script>

</body>
</html>
--
ఇట్లు మీ,
చంద్రశేఖర్.

Replace String Function 01

JavaScript Replace String function allows you to replace the specified string pattern with new string pattern in the provided string. By Default JavaScript Replace function replaces only first occurrence of specified string pattern from the provided string text. Try the sample below to understand the functionality:
<html>
<head>
<title>Javascript Replace String Function 01</title>
</head>
<body>

<script type="text/javascript">

var myString = new String();

myString = "This is first example";

// by default it will find and replace the
// first occurrence of specified string pattern
document.write(myString.replace(/ /,"-"));

</script>

</body>
</html>

--
ఇట్లు మీ,
చంద్రశేఖర్.

IndexOf String Function 01

JavaScript IndexOf string function returns the starting index of the specified string pattern from the provided string. JavaScript IndexOf function starts traversing the string from left side of the provided string and returns the first occurrence of the specified string pattern. Try the sample below:
<html>
<head>
<title>Javascript indexOf String Function 01</title>
</head>
<body>

<script type="text/javascript">

var myString = new String();

myString = "This is a sample text to test javascript function.";

document.write(myString.indexOf("s"));
document.write("<br />");

document.write(myString.indexOf("te"));
document.write("<br />");
</script>

</body>
</html>
--
ఇట్లు మీ,
చంద్రశేఖర్.

Is_Numeric () PHP Function

Definition: The is_numeric () function is used to check if a value is a number. This could be used within an if () statement to treat numbers in one way and non-numbers in another. It will return true or false. Numeric strings consist of an optional sign (such as + or -), any number of digits, optional decimal point and optional exponent. It will also identify a hexadecimal number, but only on its own without a sign, decimal or exponent.

Also Known As: Is Numeric, Is Number

Examples:

<?php
if (is_numeric (887))
{
echo "Yes";
} else {
echo "No";
}
?>

Since 887 is a number, this should echo "Yes"

<?php
if (is_numeric ("cake"))
{
echo "Yes";
} else {
echo "No";
}
?>

Since cake is not a number, this should echo "No"

--
Thanks,
B.Chandrashekhar.

Thursday, December 10, 2009

ANSI character set and equivalent Unicode and HTML characters

The ANSI set of 217 characters, also known as Windows-1252, was the standard for the core fonts supplied with US versions of Microsoft Windows up to and including Windows 95 and Windows NT 4. During the lifetime of those two products, Microsoft added the euro currency symbol bringing the number of characters to 218, and introduced a new core set of Pan-European fonts containing the WGL4 (Windows Glyph List 4) character set, with 652 characters.

If you use a version of Windows that is designed for a non-Latin alphabet such as Arabic, Cyrillic, Greek, Hebrew or Thai to view a document that has been typed using the ANSI character set, then characters from these languages may replace some of those in the 128–255 range; this problem will be resolved when Unicode becomes more widely used, because it provides a unique numeric identifier for each character. There are similar problems when transferring ANSI documents to DOS or Macintosh computers, because DOS and MacRoman arrange characters differently in the 128–255 range.

ANSI characters 32 to 127 correspond to those in the 7-bit ASCII character set, which forms the Basic Latin Unicode character range. Characters 160–255 correspond to those in the Latin-1 Supplement Unicode character range. Positions 128–159 in Latin-1 Supplement are reserved for controls, but most of them are used for printable characters in ANSI; the Unicode equivalents are noted in the table below. Entries in the "Entity" column are character entity references that can be used in HTML and should be interpreted correctly by Web browsers that support HTML 4.0.

The characters that appear in the first column of the following table are generated from Unicode numeric character references, and so they should appear correctly in any Web browser that supports Unicode and that has suitable fonts available, regardless of the operating system.

Character	ANSI Number	Unicode Number	ANSI Hex	Unicode Hex	HTML 4.0 Entity	Unicode Name	Unicode Range
' '	32	32	0x20	U+0020		space	Basic Latin
!	33	33	0x21	U+0021		exclamation mark	Basic Latin
"	34	34	0x22	U+0022	"	quotation mark	Basic Latin
#	35	35	0x23	U+0023		number sign	Basic Latin
$	36	36	0x24	U+0024		dollar sign	Basic Latin
%	37	37	0x25	U+0025		percent sign	Basic Latin
&	38	38	0x26	U+0026	&	ampersand	Basic Latin
'	39	39	0x27	U+0027		apostrophe	Basic Latin
(	40	40	0x28	U+0028		left parenthesis	Basic Latin
)	41	41	0x29	U+0029		right parenthesis	Basic Latin
*	42	42	0x2A	U+002A		asterisk	Basic Latin
+	43	43	0x2B	U+002B		plus sign	Basic Latin
,	44	44	0x2C	U+002C		comma	Basic Latin
-	45	45	0x2D	U+002D		hyphen-minus	Basic Latin
.	46	46	0x2E	U+002E		full stop	Basic Latin
/	47	47	0x2F	U+002F		solidus	Basic Latin
0	48	48	0x30	U+0030		digit zero	Basic Latin
1	49	49	0x31	U+0031		digit one	Basic Latin
2	50	50	0x32	U+0032		digit two	Basic Latin
3	51	51	0x33	U+0033		digit three	Basic Latin
4	52	52	0x34	U+0034		digit four	Basic Latin
5	53	53	0x35	U+0035		digit five	Basic Latin
6	54	54	0x36	U+0036		digit six	Basic Latin
7	55	55	0x37	U+0037		digit seven	Basic Latin
8	56	56	0x38	U+0038		digit eight	Basic Latin
9	57	57	0x39	U+0039		digit nine	Basic Latin
:	58	58	0x3A	U+003A		colon	Basic Latin
;	59	59	0x3B	U+003B		semicolon	Basic Latin
<	60	60	0x3C	U+003C	<	less-than sign	Basic Latin
=	61	61	0x3D	U+003D		equals sign	Basic Latin
>	62	62	0x3E	U+003E	>	greater-than sign	Basic Latin
?	63	63	0x3F	U+003F		question mark	Basic Latin
@	64	64	0x40	U+0040		commercial at	Basic Latin
A	65	65	0x41	U+0041		Latin capital letter A	Basic Latin
B	66	66	0x42	U+0042		Latin capital letter B	Basic Latin
C	67	67	0x43	U+0043		Latin capital letter C	Basic Latin
D	68	68	0x44	U+0044		Latin capital letter D	Basic Latin
E	69	69	0x45	U+0045		Latin capital letter E	Basic Latin
F	70	70	0x46	U+0046		Latin capital letter F	Basic Latin
G	71	71	0x47	U+0047		Latin capital letter G	Basic Latin
H	72	72	0x48	U+0048		Latin capital letter H	Basic Latin
I	73	73	0x49	U+0049		Latin capital letter I	Basic Latin
J	74	74	0x4A	U+004A		Latin capital letter J	Basic Latin
K	75	75	0x4B	U+004B		Latin capital letter K	Basic Latin
L	76	76	0x4C	U+004C		Latin capital letter L	Basic Latin
M	77	77	0x4D	U+004D		Latin capital letter M	Basic Latin
N	78	78	0x4E	U+004E		Latin capital letter N	Basic Latin
O	79	79	0x4F	U+004F		Latin capital letter O	Basic Latin
P	80	80	0x50	U+0050		Latin capital letter P	Basic Latin
Q	81	81	0x51	U+0051		Latin capital letter Q	Basic Latin
R	82	82	0x52	U+0052		Latin capital letter R	Basic Latin
S	83	83	0x53	U+0053		Latin capital letter S	Basic Latin
T	84	84	0x54	U+0054		Latin capital letter T	Basic Latin
U	85	85	0x55	U+0055		Latin capital letter U	Basic Latin
V	86	86	0x56	U+0056		Latin capital letter V	Basic Latin
W	87	87	0x57	U+0057		Latin capital letter W	Basic Latin
X	88	88	0x58	U+0058		Latin capital letter X	Basic Latin
Y	89	89	0x59	U+0059		Latin capital letter Y	Basic Latin
Z	90	90	0x5A	U+005A		Latin capital letter Z	Basic Latin
[	91	91	0x5B	U+005B		left square bracket	Basic Latin
\	92	92	0x5C	U+005C		reverse solidus	Basic Latin
]	93	93	0x5D	U+005D		right square bracket	Basic Latin
^	94	94	0x5E	U+005E		circumflex accent	Basic Latin
_	95	95	0x5F	U+005F		low line	Basic Latin
`	96	96	0x60	U+0060		grave accent	Basic Latin
a	97	97	0x61	U+0061		Latin small letter a	Basic Latin
b	98	98	0x62	U+0062		Latin small letter b	Basic Latin
c	99	99	0x63	U+0063		Latin small letter c	Basic Latin
d	100	100	0x64	U+0064		Latin small letter d	Basic Latin
e	101	101	0x65	U+0065		Latin small letter e	Basic Latin
f	102	102	0x66	U+0066		Latin small letter f	Basic Latin
g	103	103	0x67	U+0067		Latin small letter g	Basic Latin
h	104	104	0x68	U+0068		Latin small letter h	Basic Latin
i	105	105	0x69	U+0069		Latin small letter i	Basic Latin
j	106	106	0x6A	U+006A		Latin small letter j	Basic Latin
k	107	107	0x6B	U+006B		Latin small letter k	Basic Latin
l	108	108	0x6C	U+006C		Latin small letter l	Basic Latin
m	109	109	0x6D	U+006D		Latin small letter m	Basic Latin
n	110	110	0x6E	U+006E		Latin small letter n	Basic Latin
o	111	111	0x6F	U+006F		Latin small letter o	Basic Latin
p	112	112	0x70	U+0070		Latin small letter p	Basic Latin
q	113	113	0x71	U+0071		Latin small letter q	Basic Latin
r	114	114	0x72	U+0072		Latin small letter r	Basic Latin
s	115	115	0x73	U+0073		Latin small letter s	Basic Latin
t	116	116	0x74	U+0074		Latin small letter t	Basic Latin
u	117	117	0x75	U+0075		Latin small letter u	Basic Latin
v	118	118	0x76	U+0076		Latin small letter v	Basic Latin
w	119	119	0x77	U+0077		Latin small letter w	Basic Latin
x	120	120	0x78	U+0078		Latin small letter x	Basic Latin
y	121	121	0x79	U+0079		Latin small letter y	Basic Latin
z	122	122	0x7A	U+007A		Latin small letter z	Basic Latin
{	123	123	0x7B	U+007B		left curly bracket	Basic Latin
\|	124	124	0x7C	U+007C		vertical line	Basic Latin
}	125	125	0x7D	U+007D		right curly bracket	Basic Latin
~	126	126	0x7E	U+007E		tilde	Basic Latin
	127	127	0x7F	U+007F		(not used)
€	128	8364	0x80	U+20AC	€	euro sign	Currency Symbols
	129	129	0x81	U+0081		(not used)
‚	130	8218	0x82	U+201A	&sbquo;	single low-9 quotation mark	General Punctuation
ƒ	131	402	0x83	U+0192	&fnof;	Latin small letter f with hook	Latin Extended-B
„	132	8222	0x84	U+201E	&bdquo;	double low-9 quotation mark	General Punctuation
…	133	8230	0x85	U+2026	…	horizontal ellipsis	General Punctuation
†	134	8224	0x86	U+2020	&dagger;	dagger	General Punctuation
‡	135	8225	0x87	U+2021	&Dagger;	double dagger	General Punctuation
ˆ	136	710	0x88	U+02C6	&circ;	modifier letter circumflex accent	Spacing Modifier Letters
‰	137	8240	0x89	U+2030	&permil;	per mille sign	General Punctuation
Š	138	352	0x8A	U+0160	&Scaron;	Latin capital letter S with caron	Latin Extended-A
‹	139	8249	0x8B	U+2039	&lsaquo;	single left-pointing angle quotation mark	General Punctuation
Œ	140	338	0x8C	U+0152	&OElig;	Latin capital ligature OE	Latin Extended-A
	141	141	0x8D	U+008D		(not used)
Ž	142	381	0x8E	U+017D		Latin capital letter Z with caron	Latin Extended-A
	143	143	0x8F	U+008F		(not used)
	144	144	0x90	U+0090		(not used)
'	145	8216	0x91	U+2018	‘	left single quotation mark	General Punctuation
'	146	8217	0x92	U+2019	’	right single quotation mark	General Punctuation
"	147	8220	0x93	U+201C	“	left double quotation mark	General Punctuation
"	148	8221	0x94	U+201D	”	right double quotation mark	General Punctuation
•	149	8226	0x95	U+2022	•	bullet	General Punctuation
–	150	8211	0x96	U+2013	–	en dash	General Punctuation
—	151	8212	0x97	U+2014	—	em dash	General Punctuation
˜	152	732	0x98	U+02DC	&tilde;	small tilde	Spacing Modifier Letters
™	153	8482	0x99	U+2122	™	trade mark sign	Letterlike Symbols
š	154	353	0x9A	U+0161	&scaron;	Latin small letter s with caron	Latin Extended-A
›	155	8250	0x9B	U+203A	&rsaquo;	single right-pointing angle quotation mark	General Punctuation
œ	156	339	0x9C	U+0153	&oelig;	Latin small ligature oe	Latin Extended-A
	157	157	0x9D	U+009D		(not used)
ž	158	382	0x9E	U+017E		Latin small letter z with caron	Latin Extended-A
Ÿ	159	376	0x9F	U+0178	&Yuml;	Latin capital letter Y with diaeresis	Latin Extended-A
	160	160	0xA0	U+00A0		no-break space	Latin-1 Supplement
¡	161	161	0xA1	U+00A1	¡	inverted exclamation mark	Latin-1 Supplement
¢	162	162	0xA2	U+00A2	¢	cent sign	Latin-1 Supplement
£	163	163	0xA3	U+00A3	£	pound sign	Latin-1 Supplement
¤	164	164	0xA4	U+00A4	¤	currency sign	Latin-1 Supplement
¥	165	165	0xA5	U+00A5	¥	yen sign	Latin-1 Supplement
¦	166	166	0xA6	U+00A6	¦	broken bar	Latin-1 Supplement
§	167	167	0xA7	U+00A7	§	section sign	Latin-1 Supplement
¨	168	168	0xA8	U+00A8	¨	diaeresis	Latin-1 Supplement
©	169	169	0xA9	U+00A9	©	copyright sign	Latin-1 Supplement
ª	170	170	0xAA	U+00AA	ª	feminine ordinal indicator	Latin-1 Supplement
«	171	171	0xAB	U+00AB	«	left-pointing double angle quotation mark	Latin-1 Supplement
¬	172	172	0xAC	U+00AC	¬	not sign	Latin-1 Supplement
	173	173	0xAD	U+00AD		soft hyphen	Latin-1 Supplement
®	174	174	0xAE	U+00AE	®	registered sign	Latin-1 Supplement
¯	175	175	0xAF	U+00AF	¯	macron	Latin-1 Supplement
°	176	176	0xB0	U+00B0	°	degree sign	Latin-1 Supplement
±	177	177	0xB1	U+00B1	±	plus-minus sign	Latin-1 Supplement
²	178	178	0xB2	U+00B2	²	superscript two	Latin-1 Supplement
³	179	179	0xB3	U+00B3	³	superscript three	Latin-1 Supplement
´	180	180	0xB4	U+00B4	´	acute accent	Latin-1 Supplement
µ	181	181	0xB5	U+00B5	µ	micro sign	Latin-1 Supplement
¶	182	182	0xB6	U+00B6	¶	pilcrow sign	Latin-1 Supplement
·	183	183	0xB7	U+00B7	·	middle dot	Latin-1 Supplement
¸	184	184	0xB8	U+00B8	¸	cedilla	Latin-1 Supplement
¹	185	185	0xB9	U+00B9	¹	superscript one	Latin-1 Supplement
º	186	186	0xBA	U+00BA	º	masculine ordinal indicator	Latin-1 Supplement
»	187	187	0xBB	U+00BB	»	right-pointing double angle quotation mark	Latin-1 Supplement
¼	188	188	0xBC	U+00BC	¼	vulgar fraction one quarter	Latin-1 Supplement
½	189	189	0xBD	U+00BD	½	vulgar fraction one half	Latin-1 Supplement
¾	190	190	0xBE	U+00BE	¾	vulgar fraction three quarters	Latin-1 Supplement
¿	191	191	0xBF	U+00BF	¿	inverted question mark	Latin-1 Supplement
À	192	192	0xC0	U+00C0	À	Latin capital letter A with grave	Latin-1 Supplement
Á	193	193	0xC1	U+00C1	Á	Latin capital letter A with acute	Latin-1 Supplement
Â	194	194	0xC2	U+00C2	Â	Latin capital letter A with circumflex	Latin-1 Supplement
Ã	195	195	0xC3	U+00C3	Ã	Latin capital letter A with tilde	Latin-1 Supplement
Ä	196	196	0xC4	U+00C4	Ä	Latin capital letter A with diaeresis	Latin-1 Supplement
Å	197	197	0xC5	U+00C5	Å	Latin capital letter A with ring above	Latin-1 Supplement
Æ	198	198	0xC6	U+00C6	Æ	Latin capital letter AE	Latin-1 Supplement
Ç	199	199	0xC7	U+00C7	Ç	Latin capital letter C with cedilla	Latin-1 Supplement
È	200	200	0xC8	U+00C8	È	Latin capital letter E with grave	Latin-1 Supplement
É	201	201	0xC9	U+00C9	É	Latin capital letter E with acute	Latin-1 Supplement
Ê	202	202	0xCA	U+00CA	Ê	Latin capital letter E with circumflex	Latin-1 Supplement
Ë	203	203	0xCB	U+00CB	Ë	Latin capital letter E with diaeresis	Latin-1 Supplement
Ì	204	204	0xCC	U+00CC	Ì	Latin capital letter I with grave	Latin-1 Supplement
Í	205	205	0xCD	U+00CD	Í	Latin capital letter I with acute	Latin-1 Supplement
Î	206	206	0xCE	U+00CE	Î	Latin capital letter I with circumflex	Latin-1 Supplement
Ï	207	207	0xCF	U+00CF	Ï	Latin capital letter I with diaeresis	Latin-1 Supplement
Ð	208	208	0xD0	U+00D0	Ð	Latin capital letter Eth	Latin-1 Supplement
Ñ	209	209	0xD1	U+00D1	Ñ	Latin capital letter N with tilde	Latin-1 Supplement
Ò	210	210	0xD2	U+00D2	Ò	Latin capital letter O with grave	Latin-1 Supplement
Ó	211	211	0xD3	U+00D3	Ó	Latin capital letter O with acute	Latin-1 Supplement
Ô	212	212	0xD4	U+00D4	Ô	Latin capital letter O with circumflex	Latin-1 Supplement
Õ	213	213	0xD5	U+00D5	Õ	Latin capital letter O with tilde	Latin-1 Supplement
Ö	214	214	0xD6	U+00D6	Ö	Latin capital letter O with diaeresis	Latin-1 Supplement
×	215	215	0xD7	U+00D7	×	multiplication sign	Latin-1 Supplement
Ø	216	216	0xD8	U+00D8	Ø	Latin capital letter O with stroke	Latin-1 Supplement
Ù	217	217	0xD9	U+00D9	Ù	Latin capital letter U with grave	Latin-1 Supplement
Ú	218	218	0xDA	U+00DA	Ú	Latin capital letter U with acute	Latin-1 Supplement
Û	219	219	0xDB	U+00DB	Û	Latin capital letter U with circumflex	Latin-1 Supplement
Ü	220	220	0xDC	U+00DC	Ü	Latin capital letter U with diaeresis	Latin-1 Supplement
Ý	221	221	0xDD	U+00DD	Ý	Latin capital letter Y with acute	Latin-1 Supplement
Þ	222	222	0xDE	U+00DE	Þ	Latin capital letter Thorn	Latin-1 Supplement
ß	223	223	0xDF	U+00DF	ß	Latin small letter sharp s	Latin-1 Supplement
à	224	224	0xE0	U+00E0	à	Latin small letter a with grave	Latin-1 Supplement
á	225	225	0xE1	U+00E1	á	Latin small letter a with acute	Latin-1 Supplement
â	226	226	0xE2	U+00E2	â	Latin small letter a with circumflex	Latin-1 Supplement
ã	227	227	0xE3	U+00E3	ã	Latin small letter a with tilde	Latin-1 Supplement
ä	228	228	0xE4	U+00E4	ä	Latin small letter a with diaeresis	Latin-1 Supplement
å	229	229	0xE5	U+00E5	å	Latin small letter a with ring above	Latin-1 Supplement
æ	230	230	0xE6	U+00E6	æ	Latin small letter ae	Latin-1 Supplement
ç	231	231	0xE7	U+00E7	ç	Latin small letter c with cedilla	Latin-1 Supplement
è	232	232	0xE8	U+00E8	è	Latin small letter e with grave	Latin-1 Supplement
é	233	233	0xE9	U+00E9	é	Latin small letter e with acute	Latin-1 Supplement
ê	234	234	0xEA	U+00EA	ê	Latin small letter e with circumflex	Latin-1 Supplement
ë	235	235	0xEB	U+00EB	ë	Latin small letter e with diaeresis	Latin-1 Supplement
ì	236	236	0xEC	U+00EC	ì	Latin small letter i with grave	Latin-1 Supplement
í	237	237	0xED	U+00ED	í	Latin small letter i with acute	Latin-1 Supplement
î	238	238	0xEE	U+00EE	î	Latin small letter i with circumflex	Latin-1 Supplement
ï	239	239	0xEF	U+00EF	ï	Latin small letter i with diaeresis	Latin-1 Supplement
ð	240	240	0xF0	U+00F0	ð	Latin small letter eth	Latin-1 Supplement
ñ	241	241	0xF1	U+00F1	ñ	Latin small letter n with tilde	Latin-1 Supplement
ò	242	242	0xF2	U+00F2	ò	Latin small letter o with grave	Latin-1 Supplement
ó	243	243	0xF3	U+00F3	ó	Latin small letter o with acute	Latin-1 Supplement
ô	244	244	0xF4	U+00F4	ô	Latin small letter o with circumflex	Latin-1 Supplement
õ	245	245	0xF5	U+00F5	õ	Latin small letter o with tilde	Latin-1 Supplement
ö	246	246	0xF6	U+00F6	ö	Latin small letter o with diaeresis	Latin-1 Supplement
÷	247	247	0xF7	U+00F7	÷	division sign	Latin-1 Supplement
ø	248	248	0xF8	U+00F8	ø	Latin small letter o with stroke	Latin-1 Supplement
ù	249	249	0xF9	U+00F9	ù	Latin small letter u with grave	Latin-1 Supplement
ú	250	250	0xFA	U+00FA	ú	Latin small letter u with acute	Latin-1 Supplement
û	251	251	0xFB	U+00FB	û	Latin small letter with circumflex	Latin-1 Supplement
ü	252	252	0xFC	U+00FC	ü	Latin small letter u with diaeresis	Latin-1 Supplement
ý	253	253	0xFD	U+00FD	ý	Latin small letter y with acute	Latin-1 Supplement
þ	254	254	0xFE	U+00FE	þ	Latin small letter thorn	Latin-1 Supplement
ÿ	255	255	0xFF	U+00FF	ÿ	Latin small letter y with diaeresis	Latin-1 Supplement

Problems with non-Latin scripts

If you use the Arabic, Greek, Hebrew, Russian or Thai versions of Microsoft Windows to view a file that uses Latin script and includes accented characters, then the accented characters may be replaced or omitted. For example:

US Windows

Russian Windows

Thai Windows

This happens because the characters for these non-Latin scripts are coded to the same numbers as the accented Latin characters in the ANSI character set; this problem will be resolved when Unicode becomes more widely used, because it provides a unique numeric identifier for each character.

--
ఇట్లు మీ,
చంద్రశేఖర్.

Limit the Number of Characters in a Textarea or Text Field

Step 1 - Create Function

Insert the following code into the page head:

<script language="javascript" type="text/javascript">
function limitText(limitField, limitCount, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
 	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}
</script>

Step 2 - Create Text Area

Use the following code to create the form and text area (if necessary, change the name of the form and text area to suit your needs):

<form name="myform">
<textarea name="limitedtextarea" onKeyDown="limitText(this.form.limitedtextarea,this.form.countdown,100);" 
onKeyUp="limitText(this.form.limitedtextarea,this.form.countdown,100);">
 </textarea><br>
<font size="1">(Maximum characters: 100)<br>
You have <input readonly type="text" name="countdown" size="3" value="100"> characters left.</font>
 </form>

To create a single-line text field instead of a text area, use the following code:

<form name="myform">
<input name="limitedtextfield" type="text" onKeyDown="limitText(this.form.limitedtextfield,this.form.countdown,15);" 
onKeyUp="limitText(this.form.limitedtextfield,this.form.countdown,15);" maxlength="15"><br>
 <font size="1">(Maximum characters: 15)<br>
You have <input readonly type="text" name="countdown" size="3" value="15"> characters left.</font>
 </form>

--
ఇట్లు మీ,
చంద్రశేఖర్.

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Friday, December 11, 2009

JavaScript Enum

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SubString String Function 01

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Is_Numeric () PHP Function

Thursday, December 10, 2009

ANSI character set and equivalent Unicode and HTML characters

Problems with non-Latin scripts

Limit the Number of Characters in a Textarea or Text Field

Step 1 - Create Function

Step 2 - Create Text Area