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js 字串加密解密

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    <title>網頁加密及解密</title>
    <meta name="author" content="xiongzaiqiren" />
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ClassBao team coding in July 10, 2017" /> </head> <body> <p><textarea id="text1" name="textfield" cols="50" rows="5">錢莊王員外這個人怎麼樣?</textarea></p> <input type="button" name="Button1" value="加密" onClick="text1.value = MySign.Encrypt(text1.value);"> <input type="
button" name="Button2" value="解密" onClick="text1.value = MySign.UnEncrypt(text1.value);"> <script language="JavaScript"> var MySign = { //加密/解密次數 num: 0, //加密 Encrypt: function (Text) { this.num = this.num + 1; output
= new String; alterText = new Array(); varCost = new Array(); TextSize = Text.length; for (i = 0; i < TextSize; i++) { idea = Math.round(Math.random() * 111) + 77; alterText[i] = Text.charCodeAt(i) + idea; varCost[i] = idea; } console.log(alterText, varCost); for (i = 0; i < TextSize; i++) { output += String.fromCharCode(alterText[i], varCost[i]); } //text1.value = output; return output; }, //解密 UnEncrypt: function (Text) { if (this.num > 0) { this.num = this.num - 1; output = new String; alterText1 = new Array(); varCost1 = new Array(); TextSize = Text.length; for (i = 0; i < TextSize; i++) { alterText[i] = Text.charCodeAt(i); varCost[i] = Text.charCodeAt(i + 1); } for (i = 0; i < TextSize; i = i + 2) { output += String.fromCharCode(alterText[i] - varCost[i]); } //text1.value = output; return output; } } }; //測試程式碼 var testString = "光頭強,還不去砍樹?"; console.log(testString); var sign = MySign.Encrypt(testString); //湊ˆ妣o忕›ァ[還¬什³呯´硠S桲aチb var sign2 = MySign.UnEncrypt(sign); //光頭強,還不去砍樹? console.log(sign); console.log(sign2); </script> </body> </html>