Here is a short example of a Web page that includes some JScript code that needs protecting:

Example

CopyCode imageCopy Code
<HTML>
<HEAD>
<TITLE>Script Encoder Sample Page</TITLE>
<SCRIPT LANGUAGE="JScript">
<!--//
//Copyright© 1998 Microsoft Corporation. All Rights Reserved.
//**Start Encode**
function verifyCorrectBrowser(){
  if(navigator.appName == "Microsoft Internet Explorer")
    if (navigator.appVersion.indexOf ("5.") >= 0)
      return(true);
    else
      return(false);
}
function getAppropriatePage(){
  var str1 = "Had this been an actual Web site, a page compatible with ";
  var str2 = "browsers other than ";
  var str3 = "Microsoft Internet Explorer 5.0 ";
  var str4 = "would have been loaded.";
  if (verifyCorrectBrowser())
    document.write(str1 + str3 + str4);
  else
    document.write(str1 + str2 + str3 + str4);
}
//-->
</SCRIPT>
</HEAD>
<BODY onload="getAppropriatePage()">
</BODY>
</HTML>

Here's the same page as it appears after being run through the Script Encoder:

CopyCode imageCopy Code
<HTML>
<HEAD>
<TITLE>Script Encoder Sample Page</TITLE>
<SCRIPT LANGUAGE="JScript.Encode">
<!--//
//Copyright© 1998 Microsoft Corporation. All Rights Reserved.
//**Start Encode**#@~^QwIAAA==@#@&0;mDkWP7nDb0zZKD.n1YAMGhk+Dvb`@#@&P,kW`UC7kLlDGDcl22gl:n~{'~Jtr1DGkW6YP&xDnD+OPA62sKD+ME#@#@&P,~~k6PvxC\rLmYGDcCwa.n.kkWU bx[+X66Pcr*cJ#,@*{~!*P~P,P~._YEMU`DDE_bIP,P,+s/n@#@&P~P,~PM+O;Mx`WC^/n#pN6EU1YbWx,o_Obaw.WaDrCD+nmL+v#@#@&~P7lMPdY.q,'~J_CN,Y4rkP4nnPCx,C1Y;mV,_+(PkrY_~~l,wCL_PmKhwmYk(snPSkDt~JI@#@&P~\m.PkY.+,'PE8MWA/_.kPGDt_DPDtmUPri@#@&,P-CMP/D.&,'Pr\rmMWkWWY~(YnDnY,2a2^WDn.,* !,Ep@#@&,P7lD,/D.c,'~JSW;s9Ptm-+,4+_U~VKl9+[REI,Pr0,c\_DrWHZW.._mOAMGS/nM`*#@#@&P,~P9W^Es+UOchDbO+v/YMq~_,/DDfPQ~kY.c*IP,+sd_@#@&~~,P[W1;s+UDRSDkD+vdYMF~_,/O.yP_,dYM&P3~dYMc*iNz&R @*^#~@
//-->
</SCRIPT>
</HEAD>
<BODY onload="getAppropriatePage()">
</BODY>
</HTML>
NoteNote

After encoding, if you change even one character in the encoded text, the integrity of the entire script is lost and it can no longer be used.

See Also