Cara Melindungi Halaman Web dengan Kata Sandi

 < 
 SCRIPT 
 > 
 function 
 passWord 
 () 
 { 
 var 
 testV 
 = 
 1 
 ; 
 var 
 pass1 
 = 
 prompt 
 ( 
 'Please Enter Your Password' 
 , 
 ' ' 
 ); 
 while 
 ( 
 testV 
 < 
 3 
 ) 
 { 
 if 
 ( 
 ! 
 pass1 
 ) 
 history 
 . 
 go 
 ( 
 - 
 1 
 ); 
 if 
 ( 
 pass1 
 . 
 toLowerCase 
 () 
 == 
 "letmein" 
 ) 
 { 
 alert 
 ( 
 'You Got it Right!' 
 ); 
 window 
 . 
 open 
 ( 
 'www.wikihow.com' 
 ); 
 break 
 ; 
 } 
 testV 
 += 
 1 
 ; 
 var 
 pass1 
 = 
 prompt 
 ( 
 'Access Denied - Password Incorrect, Please Try Again.' 
 , 
 'Password' 
 ); 
 } 
 if 
 ( 
 pass1 
 . 
 toLowerCase 
 () 
 != 
 "password" 
 & 
 testV 
 == 
 3 
 ) 
 history 
 . 
 go 
 ( 
 - 
 1 
 ); 
 return 
 " " 
 ; 
 } 
 </ 
 SCRIPT 
 > 
 < 
 CENTER 
 > 
 < 
 FORM 
 > 
 < 
 input 
 type 
 = 
 "button" 
 value 
 = 
 "Enter Protected Area" 
 onClick 
 = 
 "passWord()" 
 > 
 </ 
 FORM 
 > 
 </ 
 CENTER 
 >