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261 lines
8.6 KiB
HTML
261 lines
8.6 KiB
HTML
<!doctype html>
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<html lang="en"><!-- #BeginTemplate "/Templates/Main.dwt" --><!-- DW6 -->
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<!-- Mirrored from www.mathsisfun.com/games/secret-messages.html by HTTrack Website Copier/3.x [XR&CO'2014], Sat, 29 Oct 2022 01:06:42 GMT -->
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<head>
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<!-- #BeginEditable "doctitle" -->
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<title>Secret Messages</title>
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<!-- #EndEditable -->
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<meta name="keywords" content="math, maths, mathematics, school, homework, education">
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<meta name="HandheldFriendly" content="true">
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<meta http-equiv="pics-label" content='(PICS-1.1 "http://www.classify.org/safesurf/" L gen true for "http://www.mathsisfun.com" r (SS~~000 1))'>
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<meta name="referrer" content="always">
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<link rel="stylesheet" type="text/css" href="../style3.css" />
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<script src="../main3.js" type="text/javascript"></script>
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</head>
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<body id="bodybg">
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<div class="bg">
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<div id="stt"></div>
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<div id="hdr"></div>
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<div id="logo"><a href="../index.html"><img src="../images/style/logo.svg" alt="Math is Fun" /></a></div>
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<div id="gtran"><script type="text/javascript">document.write(getTrans());</script></div>
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<div id="gplus"><script type="text/javascript">document.write(getGPlus());</script></div>
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<div id="adTopOuter" class="centerfull noprint">
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<div id="adTop">
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<script type="text/javascript">document.write(getAdTop());</script>
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</div>
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</div>
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<div id="adHide">
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<div id="showAds1"><a href="javascript:showAds()">Show Ads</a></div>
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<div id="hideAds1"><a href="javascript:hideAds()">Hide Ads</a><br>
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<a href="../about-ads.html">About Ads</a></div>
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</div>
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<div id="menuWide" class="menu">
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<script type="text/javascript">document.write(getMenu(0));</script>
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</div>
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<div id="linkto">
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<div id="linktort"><script type="text/javascript">document.write(getLinks());</script></div>
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</div>
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<div id="search" role="search"><script type="text/javascript">document.write(getSearch());</script></div>
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<div id="menuSlim" class="menu">
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<script type="text/javascript">document.write(getMenu(1));</script>
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</div>
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<div id="menuTiny" class="menu">
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<script type="text/javascript">document.write(getMenu(2));</script>
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</div>
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<div id="extra"></div>
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</div>
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<div id="content" role="main"><!-- #BeginEditable "Body" -->
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<script language="JavaScript">
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<!-- Original: Colin Russell (niloc12@hotmail.com) -->
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<!-- Web Site: http://www.geocities.com/niloc12.geo -->
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<!-- This script and many more are available free online at -->
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<!-- The JavaScript Source!! http://javascript.internet.com -->
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<!-- Begin
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var wt = ""; //temporary holder
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var et = ""; //encoded text
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var all = "";
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var all2 = "";
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var alpha2 = "abcdefghijklmnopqrstuvwxyz";
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var a = "a"; var b = "b"; var c = "c"; var d = "d";
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var e = "e"; var f = "f"; var g = "g"; var h = "h";
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var i = "i"; var j = "j"; var k = "k"; var l = "l";
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var m = "m"; var n = "n"; var o = "o"; var p = "p";
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var q = "q"; var r = "r"; var s = "s"; var t = "t";
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var u = "u"; var v = "v"; var w = "w"; var x = "x";
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var y = "y"; var z = "z";
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var alpha = new Array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z');
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function encode() {
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wt = "";
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et = "";
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all = "";
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var theText = document.f1.ta1.value.toLowerCase();
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var num = document.f1.tb1.value;
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i2 = 0;
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for (i = 0; i < num; i++) {
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i2 = i2 + 1;
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if (i2 == 26) i2 = 0;
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}
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a = alpha[i2]; i2 = next(i2);
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b = alpha[i2]; i2 = next(i2);
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c = alpha[i2]; i2 = next(i2);
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d = alpha[i2]; i2 = next(i2);
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e = alpha[i2]; i2 = next(i2);
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f = alpha[i2]; i2 = next(i2);
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g = alpha[i2]; i2 = next(i2);
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h = alpha[i2]; i2 = next(i2);
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i = alpha[i2]; i2 = next(i2);
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j = alpha[i2]; i2 = next(i2);
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k = alpha[i2]; i2 = next(i2);
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l = alpha[i2]; i2 = next(i2);
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m = alpha[i2]; i2 = next(i2);
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n = alpha[i2]; i2 = next(i2);
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o = alpha[i2]; i2 = next(i2);
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p = alpha[i2]; i2 = next(i2);
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q = alpha[i2]; i2 = next(i2);
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r = alpha[i2]; i2 = next(i2);
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s = alpha[i2]; i2 = next(i2);
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t = alpha[i2]; i2 = next(i2);
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u = alpha[i2]; i2 = next(i2);
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v = alpha[i2]; i2 = next(i2);
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w = alpha[i2]; i2 = next(i2);
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x = alpha[i2]; i2 = next(i2);
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y = alpha[i2]; i2 = next(i2);
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z = alpha[i2]; i2 = next(i2);
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var all = a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+u+v+w+x+y+z;
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all = all.split("");
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encode2(all);
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}
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function next(x) {
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if (x == 25) x = -1;
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x = x + 1;
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return x;
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}
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function encode2(all2) {
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var temp2 = document.f1.ta1.value.toLowerCase();
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temp2 = temp2.split("");
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var q = 0;
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while (q < temp2.length) {
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wt = temp2[q];
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var where = alpha2.indexOf(wt);
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if (where == -1) { et += wt; }
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if (where != -1) { et += all2[where]; }
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q = q + 1;
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}
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document.f1.ta1.value = et;
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}
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function decode() {
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wt = "";
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et = "";
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all = "";
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all3 = "";
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var theText = document.f1.ta1.value.toLowerCase();
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var num = document.f1.tb1.value;
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i2 = 0;
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for (i = 0; i < num; i++) {
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i2 = i2 + 1;
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if (i2 == 26) i2 = 0;
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}
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a = alpha[i2]; i2 = next(i2);
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b = alpha[i2]; i2 = next(i2);
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c = alpha[i2]; i2 = next(i2);
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d = alpha[i2]; i2 = next(i2);
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e = alpha[i2]; i2 = next(i2);
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f = alpha[i2]; i2 = next(i2);
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g = alpha[i2]; i2 = next(i2);
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h = alpha[i2]; i2 = next(i2);
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i = alpha[i2]; i2 = next(i2);
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j = alpha[i2]; i2 = next(i2);
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k = alpha[i2]; i2 = next(i2);
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l = alpha[i2]; i2 = next(i2);
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m = alpha[i2]; i2 = next(i2);
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n = alpha[i2]; i2 = next(i2);
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o = alpha[i2]; i2 = next(i2);
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p = alpha[i2]; i2 = next(i2);
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q = alpha[i2]; i2 = next(i2);
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r = alpha[i2]; i2 = next(i2);
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s = alpha[i2]; i2 = next(i2);
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t = alpha[i2]; i2 = next(i2);
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u = alpha[i2]; i2 = next(i2);
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v = alpha[i2]; i2 = next(i2);
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w = alpha[i2]; i2 = next(i2);
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x = alpha[i2]; i2 = next(i2);
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y = alpha[i2]; i2 = next(i2);
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z = alpha[i2]; i2 = next(i2);
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var all = a+b+c+d+e+f+g+h+i+j+k+l
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+m+n+o+p+q+r+s+t+u+v+w+x+y+z;
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all3 = all;
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all = all.split("");
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decode2(all3);
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}
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function decode2(all2) {
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var alpha2 = "abcdefghijklmnopqrstuvwxyz";
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alpha2 = alpha2.split("");
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var temp2 = document.f1.ta1.value.toLowerCase();
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temp2 = temp2.split("");
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var v = 0;
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while (v < temp2.length) {
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wt = temp2[v];
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var where = all2.indexOf(wt);
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if (where == -1) { et += wt; }
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if (where != -1) { et += alpha2[where]; }
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v = v + 1;
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}
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document.f1.ta1.value = et;
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}
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// End -->
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</script>
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<h1 align="center">Secret Messages</h1>
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<div class="simple">
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<table width="90%" border="0" align="center">
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<tr>
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<td>
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<p>Now you can send secret message to your friends ... using <i>cryptogtaphy*</i>. </p>
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<p> Type your message, and your special <b>Key Value </b>(such as 1 or 2, etc), then press "Encode". </p>
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<p>Your friends can decode the message when you tell them the Key Value.</p>
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</td>
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</tr>
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</table>
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<br/>
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</div>
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<center>
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<form name=f1>
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<textarea name=ta1 cols=40 rows=12></textarea>
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<p>
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Key Value:
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<input type="text" size=10 name="tb1" value="1" />
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<br/>
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<input type="button" value="Encode Message" onClick="encode(); return false;" />
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<input type="button" value="Decode Message" onClick="decode(); return false;" />
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</p></form>
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</center>
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<br/>
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<h2> *How does it work?
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</h2>
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<div class="simple">
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<table width="90%" border="0" align="center">
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<tr>
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<td>
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<p>It uses a simple method of Cryptogtraphy (the study of secret messages) called "Key Offset". </p>
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<p>Each letter in your message is moved forward in the alphabet a number of places (based on your Key Value)</p>
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<p>Try typing in "abcd" and use a Key Value of 1, and you will get the idea ... I did say it was simple!</p>
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<p><i>Just don't tell anyone how it works, or they may figure out how to decode your message!</i></p>
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<p>Maybe you can think of a better method?</p>
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</td>
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</tr>
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</table>
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<br/>
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</div>
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<div class="related">
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<div id="copyrt">
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Copyright © 2018 MathsIsFun.com
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