Favorite Background - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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JavaScript Basics

Inserting Javascript

Complete Tutorial

Advance DHTML Tutorial


Favorite Background		[View Sample]

Let a JavaScript cookie remember your favorite background color. On future visits, it automatically displays that background color for you.


Insert into <HEAD>
<SCRIPT LANGUAGE = "JavaScript"> <!-- Original: Mattias Sjoberg <!-- Begin var expDays = 30; var exp = new Date(); exp.setTime(exp.getTime() + (expDays2460601000)); 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>

Insert into <BODY>
<SCRIPT> document.write('your favorite background color is : ' + color()); </SCRIPT> <br> <a href="JavaScript:set()">Change background color</a>

Other Options