Password Protect Page - Multiple Users JavaScript Code

Create web pages with user name and password protection. This script supporting multiple users, multiple passwords, and even you can redirect them to a separate destination page when they log in successfully.

Very useful tool if you want your own or your users can have their own protected page.

Script Demo:

Demo

JavaScript Code:

Insert this code into <head> tags

Insert this code into <body> tags

<center><table border=1>
<tr><form name=members><td rowspan=4>
<select name=memlist size=10 onChange="showmem(this.form)">

<!-- Original:  Dion  -->
<!-- Web Site:  http://members.xoom.com/yoboseyo -->



<!-- "member name | password | destination pagename |" -->
<option selected value="John Smith|password|mainpage|">John Smith
<option value="Peter Jones|theirpwd|endpages|">Peter Jones
<option value="Sue Brown|asdfvcxz|nowheres|">Sue Brown
<option value="Sally West|zaqxswde|logintop|">Sally West
</select></td>
<td align=right>User:</td><td><input type=hidden value="0" name=entry>
<input type=text name=memname size=8 value=""></td></tr>
<tr><td align=right>Password:</td><td><input type=text name=password size=8 maxlength=8><font size="-1"><-- Must be exactly 8 characters</font></td></tr>
<tr><td align=right>Page Name:</td><td><input type=text name=pagename size=8 maxlength=8><b>.html</b><font size="-1"><-- Must be exactly 8 characters</font></td></tr>
<tr><td colspan=2 align=center>
<input type=button value="New User" onclick="addnew(this.form);">
<input type=button value="Delete User" onclick="delthis(this.form);">
<input type=button value="Update/Show Coding" onclick="update(this.form); create(this.form);"></td></tr>
<tr><td colspan=3 align=center>
<input type=text size=60 name=message value="Note:  Password/Page Name must be exactly 8 letters! (a-z)">
<input type=hidden name=num value=1></td>
</form></tr>
</table>
<hr size=2 width=75%>
<form name=js><textarea cols=75 rows=10 name=scrpt wrap=virtual>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var params=new Array(4);
var alpha="ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHI";
function check(form) {
which=form.memlist.selectedIndex;
choice = form.memlist.options[which].value+"|";
if (choice=="x|") {
alert("Please Select Your Name From The List");
return;
}
p=0;
for (i=0;i<3;i++) {
a=choice.indexOf("|",p);
params[i]=choice.substring(a,p);
p=a+1;
}
h1=makehash(form.pass.value,3);
h2=makehash(form.pass.value,10)+" ";
if (h1!=params[1]) {
alert("Incorrect Password!"); return; };
var page="";
for (var i=0;i<8;i++) {
letter=params[2].substring(i,i+1)
ul=letter.toUpperCase();
a=alpha.indexOf(ul,0);
a-=(h2.substring(i,i+1)*1);
if (a<0) a+=26;
page+=alpha.substring(a,a+1); };
top.location=page.toLowerCase()+".html";
}
function makehash(pw,mult) {
pass=pw.toUpperCase();
hash=0;
for (i=0;i<8;i++) {
letter=pass.substring(i,i+1);
c=alpha.indexOf(letter,0)+1;
hash=hash*mult+c;
}
return(hash);
}
// End -->
</script>
</textarea>
</form>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var params=new Array(4);
var script=document.js.scrpt.value;
document.js.scrpt.value="Create your users, their passwords, and their destination pages using the form above.\n\nThen, click 'Show Coding' to see the login HTML and JavaScript that you need to put on your page to password-protect your site with that info.\n\nQuestions about this script or how to put it on your site should be directed to it's author via email:  dion@mailhub.omen.com.au\n\n*Honestly, we don't even totally understand this JavaScript!*";
var alpha="ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHI";
showmem(document.members);
function showmem(form) {
document.members.num.value=document.members.memlist.length;
var which=form.memlist.selectedIndex;
splt(form.memlist[which].value);
form.entry.value=which+1;
for (i=2;i<5;i++) {
form.elements[i].value=params[i-2]; };
}
function splt(choice) {
p=0;
for (i=0;i<3;i++) {
a=choice.indexOf("|",p);
params[i]=choice.substring(a,p);
p=a+1;
   }
}
function addnew(form) {
newmem=getfields(form);
var who=prompt("New User's Name:","");
form.memlist[form.memlist.length] = new Option(who, newmem, false, true);
if (navigator.appName=="Netscape") {
document.js.scrpt.value=script;
history.go(0);
}
else {
showmem(document.members);
   }
}
function getfields(form) {
newmem="";
for (i=2;i<5;i++) {
newmem+=form.elements[i].value+"|"; };
for (i=3;i<5;i++) {
a=form.elements[i];
for (k=0;k<8;k++) {
   }
}
return(newmem);
}
function delthis(form) {
if (confirm("Delete "+form.memname.value+"?")) {
form.memlist.options[form.entry.value-1]=null;
form.message.value=form.memname.value+" Deleted";
form.memlist.selectedIndex=0;
if (navigator.appName=="Netscape") {
document.js.scrpt.value=script;
history.go(0);
}
else {
showmem(document.members);
      }
   }
}
function update(form) {
msg="no";
a=form.elements[i];
for (k=0;k<8;k++) {
b=a.value.substring(k,k+1);
c=b.toUpperCase();
form.memlist[form.entry.value-1].value=getfields(form);
form.message.value=form.memname.value+"'s record was updated";
   }
}
function create(form) {

var html="<center><form name=login>\n";
html+="<table border=1 cellpadding=3>\n\n";
html+="<!-- Original:  Dion  -->\n";
html+="<!-- Web Site:  http://members.xoom.com/yoboseyo -->\n";
html+="<!-- This script and many more are available free online at -->\n";
html+="<!-- The JavaScript Source!! http://javascript.internet.com -->\n\n";
html+='<tr><td colspan=2 align=center><font size="+2">';
html+='<b>Members-Only Area!</b></font></td></tr>\n';
html+="<tr><td>Username:</td><td><select name=memlist>\n<option value='x'>";
for (j=0;j<form.memlist.length;j++) {
splt(form.memlist.options[j].value);
h1=makehash(params[1],3);
h2=makehash(params[1],10)+" ";
var page="";
for (var i=0;i<8;i++) {
letter=params[2].substring(i,i+1);
ul=letter.toUpperCase();
a=alpha.indexOf(ul,0);
a+=(h2.substring(i,i+1)*1);
page+=alpha.substring(a,a+1);
}
html+="\n<option value='"+params[0]+"|"+h1+"|"+page+"'>"+params[0];
};
html+="\n</select></td></tr>\n";
html+="<tr><td>Password:</td><td><input type=password size=10 maxlength=8 name=pass></td></tr>\n";
html+='<tr><td colspan=2 align=center><input type=button value="Login" onclick="check(this.form)"></td>\n';
html+="</tr>\n</table>\n</form>\n";
document.js.scrpt.value=html+script+"</center>";
}
function makehash(pw,mult) {
pass=pw.toUpperCase();
hash=0;
for (i=0;i<8;i++) {
letter=pass.substring(i,i+1);
c=alpha.indexOf(letter,0)+1;
hash=hash*mult+c;
}
return(hash);
}
// End -->
</script>
</center>

Instruction:

Refer to the instructions within the script to learn more.

Webmaster » Web Programming » JavaScript » Password Protection » Protect Page - Multiple Users

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