Javascripts > Misc Javascripts > Simple Encryption
Script Title: Simple Encryption
Description: This script will help newbies in writing there very own encryption script. It is commented to help with the code. It will encrypt and decrypt.
Example: Available
Copy the following code into your <HEAD></HEAD> tags.<script language="JavaScript1.2"> <!-- function convert_It(form) { var a = escape(form1.first.value); <!-- Get textbox1 string --> var b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ%@#$^&*()-_=+.:"; <!-- letters to compare to --> var c = "zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA +=_-)(*&^$#@:."; <!-- letter to change string to --> var d; var h; var i; var j = ""; var f = a.length; <!-- get length of the textbox1 string --> var e = 0; var g = 1; while (e != f) { <!-- while e is not equal to the string length loop --> d = a.substring(e,g); <!-- get each letter in the text box --> h = b.indexOf(d); <!-- find that letter in var b --> i = c.charAt(h); <!-- change it to the letter in var c --> e++; <!-- add one to var e --> g++; <!-- add one to var g --> j += i; <!-- write out each letter --> } form1.second.value = j; <!-- the final output put in textbox2 --> } function unconvert_It(form) { var aa = form1.second.value; var bb = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ @#$^&*()-_=+.:"; var cc = "zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA +=_-)(*&^$#@:."; var dd; var hh; var ii; var jj = ""; var ff = aa.length; var ee = 0; var gg = 1; while (ee != ff) { dd = aa.substring(ee,gg); hh = cc.indexOf(dd); <!-- just switch var b with c to unencode ex(h = b.indexOf(d); now ='s hh = cc.indexOf(dd);)--> ii = bb.charAt(hh); <!-- just switch var c with b to unencode --> ee++; gg++; jj += ii; } form1.second.value = jj; } //--> </script>
Copy the following code between the <BODY></BODY> tags of your html page.<form name="form1" id="form1"> <textarea cols="40" rows="20" name="first"></textarea> <input type="button" name="go" value="Convert" onClick="convert_It(this.form)"> <input type="button" name="unconvert" value="Unconvert" onClick="unconvert_It(this.form)"> <textarea cols="40" rows="20" name="second"></textarea> </form>
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