代码如下：
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function Encrypt(theText) { output = new String; Temp = new Array(); Temp2 = new Array(); TextSize = theText.length; for (i = 0; i < TextSize; i++) { rnd = Math.round(Math.random() * 122) + 68; Temp[i] = theText.charCodeAt(i) + rnd; Temp2[i] = rnd; } for (i = 0; i < TextSize; i++) { output += String.fromCharCode(Temp[i], Temp2[i]); } return output; } function unEncrypt(theText) { output = new String; Temp = new Array(); Temp2 = new Array(); TextSize = theText.length; for (i = 0; i < TextSize; i++) { Temp[i] = theText.charCodeAt(i); Temp2[i] = theText.charCodeAt(i + 1); } for (i = 0; i < TextSize; i = i+2) { output += String.fromCharCode(Temp[i] - Temp2[i]); } return output; } // End --> </script> <center> <form name=encform onsubmit="return false;"> <textarea name=box1 rows=5 cols=50>Typhoon Start JavaScript Fairyland