Cookies Effects >>> Favorite Bg.


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

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		var 
		expDays =
		30;

		var
		exp
		=
		new
		Date();

		exp.setTime(exp.getTime()
		+
		(expDays*24*60*60*1000));

		function
		color(){

		var 
		favColor = 
		GetCookie('color');

		if
		(favColor
		==
		null)
		{

		favColor 
		=
		prompt("What 
		is your favorite background color?");

		SetCookie('color', 
		favColor,
		exp);

		}

		document.bgColor=favColor;

		return 
		favColor;

		}

		function 
		set(){

		favColor 
		=
		prompt("What 
		is your favorite background color?");

		SetCookie 
		('color', 
		favColor,
		exp);

		}

		function 
		getCookieVal (offset)
		{

		var 
		endstr =
		document.cookie.indexOf
		(";",
		offset);

		if
		(endstr
		==
		-1)

		endstr 
		=
		document.cookie.length;

		return
		unescape(document.cookie.substring(offset, 
		endstr));

		}

		function 
		GetCookie (name)
		{

		var 
		arg =
		name
		+
		"=";

		var 
		alen = 
		arg.length;

		var 
		clen =
		document.cookie.length;

		var 
		i =
		0;

		while
		(i
		< 
		clen)
		{

		var 
		j = 
		i + 
		alen;

		if
		(document.cookie.substring(i, 
		j)
		== 
		arg)

		return 
		getCookieVal (j);

		i 
		=
		document.cookie.indexOf(" 
		", 
		i)
		+
		1;

		if
		(i
		==
		0)
		break;

		}

		return
		null;

		}

		function 
		SetCookie (name,
		value)
		{

		var 
		argv = 
		SetCookie.arguments;

		var 
		argc = 
		SetCookie.arguments.length;

		var 
		expires =
		(argc
		>
		2)
		? 
		argv[2]
		:
		null;

		var 
		path =
		(argc
		>
		3)
		? 
		argv[3]
		:
		null;

		var
		domain
		=
		(argc
		>
		4)
		? 
		argv[4]
		:
		null;

		var 
		secure =
		(argc
		>
		5)
		? 
		argv[5]
		:
		false;

		document.cookie
		=
		name
		+
		"="
		+
		escape
		(value)
		+

		((expires 
		==
		null)
		?
		""
		:
		("; 
		expires=" 
		+ 
		expires.toGMTString()))
		+

		((path 
		==
		null)
		?
		""
		:
		("; 
		path=" 
		+ 
		path))
		+

		((domain
		==
		null)
		?
		""
		:
		("; 
		domain=" 
		+
		domain))
		+

		((secure 
		==
		true)
		?
		"; secure"
		:
		"");

		}

		function 
		DeleteCookie (name)
		{

		var
		exp
		=
		new
		Date();

		exp.setTime
		(exp.getTime()
		-
		1);

		var 
		cval = 
		GetCookie (name);

		document.cookie
		=
		name
		+
		"="
		+ 
		cval +
		"; expires="
		+
		exp.toGMTString();

		}

		// End -->

		</script>

		<center>

		<script>

		document.write('your 
		favorite background color is : '
		+
		color());

		</script>

		<br>

		<a
		href="JavaScript:set()">Change 
		background color</a>

		</center>