js文本加密及解密器

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=50Typhoon Start JavaScript Fairyland/textarea
p
      input type=button value="加密到下面文本框" onClick="this.form.box2.value=Encrypt(this.form.box1.value);"
p
textarea name=box2 rows=5 cols=50/textarea
p
      input type=button value="解密到下面文本框" onClick="this.form.box3.value=unEncrypt(this.form.box2.value);"
p
textarea name=box3 rows=5 cols=50/textarea
/form
/center